Words with U

The letter "U" is the twenty-first letter of the modern English alphabet and is classified as a vowel, one of the language's essential phonetic components.

See words
Example image of the letter U
Example image of the letter U
Braille of the letter U
Braille of the letter U
Letter U morse code
Letter U morse code

History of the letter U

Its origin lies in the Phoenician alphabet, evolving from the letter "waw," which represented a labial-velar approximant sound. The Greeks adopted this symbol as "upsilon," and it was later incorporated into the Latin alphabet, which directly influenced its English form. Phonetically, "U" can produce multiple sounds depending on its placement and the letters surrounding it, including the long "u" sound as in "universe," the short "u" as in "under," and the schwa sound, which occurs in unstressed syllables, like the second syllable of "focus." Beyond its phonological roles, "U" holds significance in various fields and contexts. In mathematics, "U" denotes the union in set theory, representing the combination of distinct sets. In chemistry, "U" is the symbol for uranium, a key element with critical applications in nuclear energy and radiometric dating. Additionally, "U" has cultural and symbolic meanings; for instance, it often represents the universal or the collective in phrases like "the Universe." Its shape, resembling a cup or a vessel, has been interpreted symbolically in various artistic and literary contexts to represent receptivity, nourishment, or the feminine. Thus, the letter "U" embodies a rich tapestry of meanings and uses, highlighting its importance not just in linguistic structures but across a spectrum of scientific, mathematical, and cultural domains.


Words that start with U

U bolt

A U bolt is a fastener with a U-shaped metal rod that has threads on b...

U Nu

The meaning of U Nu can be summed up as the embodiment of charismatic ...

U quark

The u quark is a type of elementary particle with a fractional electri...

U Thant

U Thant was a Burmese diplomat who served as the third Secretary-Gener...

U-235

U-235 is a fissile isotope of uranium used in nuclear reactors and wea...

U-238

U-238 is a naturally occurring radioactive isotope with a half-life of...

U-239

U-239 is a radioactive isotope that is used for nuclear power generati...

U-bend

A U-bend is a pipe fitting shaped like the letter U used to prevent se...

U-boat

A U-boat is a type of submarine that was deployed by Germany during Wo...

U-boats

U-boats were submarine warships used by Germany in both World Wars to ...

U-shaped

The term U-shaped refers to a shape that resembles the letter U, with ...

U-shaped valley

A U-shaped valley is a glacier-carved valley with steep sides and a fl...

U-turn

A U-turn is a reversal of direction or decision, often done abruptly....

U-value

The U-value represents the overall heat transfer coefficient of a buil...

U. & l.c.

The meaning of u. & l.c. can be described as an unconventional ...

U. of S. Afr.

U. of S. Afr. stands for University of South Africa....

U.A.E.

The U.A.E. stands for United Arab Emirates, a country in the Middle Ea...

U.A.R.

U.A.R. stands for United Arab Republic, with the word United emphasizi...

U.B.

U.B. is a computer science term that stands for upper bound, represent...

U.c.

The meaning of u.c. is uppercase, which refers to letters that are cap...

U.C.V.

U.C.V. stands for Universidad Central de Venezuela, which is a prestig...

U.D.C.

Universal Decimal Classification is a system of classification that ar...

U.F.C.

U.F.C. is an organization that promotes mixed martial arts competition...

U.K.

The U.K. refers to the United Kingdom, a country composed of England, ...

U.P.W.A.

U.P.W.A. stands for United Pilots of World Airlines representing a glo...

U.S. RDA

U.S. RDA, or Recommended Dietary Allowances, define the recommended da...

U.S.A.F.

U.S.A.F. stands for United States Air Force....

U.S.A.F.R.

The meaning of U.S.A.F.R. can be described as the United States Air Fo...

U.S.C.

U.S.C. stands for United States Code and refers to the official compil...

U.S.C. Supp.

U.S.C. Supp. refers to the supplement of the United States Code which ...

U.S.C.&G.S.

U.S.C.&G.S. stands for United States Code and General Statutes, which ...

U.S.C.A.

U.S.C.A. stands for United States Code Annotated, which is a comprehen...

U.S.G.A.

The United States Golf Association (U.S.G.A.) is a governing body for ...

U.S.L.T.A.

The meaning of U.S.L.T.A. can be described as the United States Lawn T...

U.S.M.A.

U.S.M.A. stands for United States Military Academy, with Academy being...

U.S.P.

U.S.P. stands for United States Pharmacopeia, which sets quality stand...

U.S.S.

U.S.S. stands for United States Ship, indicating a naval vessel from t...

U.S.S.B.

U.S.S.R. stood for the Union of Soviet Socialist Republics, with the w...

U.S.S.Ct.

U.S.S.Ct. stands for the United States Supreme Court, the highest cour...

U.S.S.S.

U.S.S.S. stands for United States Secret Service, a federal agency res...

U.S.V.

The meaning of U.S.V. is United States versus....

U.T.W.A.

U.T.W.A. stands for Understanding The Whole Argument, emphasizing the ...

U/D

The meaning of U/D is upward/downward movement....

U/w

Underwriter is a professional who assesses and assumes the risk of ano...

U2

U2 is a band known for their iconic music and impactful social activis...

U4E

U4E means "Unicode for Everyone."...

Ua

Ua means rain in Hawaiian, with rain being a special phenomena in the ...

Ua mau ke ea o ka aina i ka pono

Ua mau ke ea o ka aina i ka pono means the prosperity of the land is p...

Uakari

A uakari is a type of monkey found in South America with a distinctive...

UAM

UAM, or Unmanned Aircraft System Traffic Management, is the system for...

UAP

UAP, or Unidentified Aerial Phenomenon, refers to unexplained sighting...

UART

UART stands for Universal Asynchronous Receiver/Transmitter and it is ...

UAS

Unmanned Aircraft Systems are aircraft operated without a human pilot ...

Uaupés

Uaupés refers to an indigenous community in the Amazon rainforest....

UAV

UAV, or Unmanned Aerial Vehicle, is a drone that operates without a hu...

UAW

The United Auto Workers union represents laborers in the automotive in...

UB40

UB40 is a British reggae band that formed in 1978, with the band's nam...

Ubangi

Ubangi refers to a river in Central Africa....

Ubangi-Shari

The colonial territory of Ubangi-Shari was located in Central Africa....

Ube

Ube is a purple yam popular in Filipino cuisine for its sweet flavor a...

Uber

The word uber describes something that is extremely outstanding or exc...

Uberaba

Uberaba is a city in Brazil known for its cattle production and agricu...

Uberlândia

Uberlândia is a city in Brazil known for its vibrant culture and econo...

Übermensch

The concept of Übermensch refers to a superior being who transcends tr...

Uberrima fides

The principle of uberrima fides in contract law emphasizes the importa...

Ubersexual

The term ubersexual refers to a man who is confident in his masculinit...

UBI

Universal Basic Income is a guaranteed payment provided to all citizen...

Ubi sunt

Ubi sunt is a Latin phrase that questions the whereabouts of former ci...

Ubi supra

Ubi supra means "above," indicating a previous reference to the topic ...

Ubiety

Ubiety is the presence or location of something or someone in a partic...

Ubique

Ubique means "everywhere" or "anywhere" in Latin....

Ubiquinone

Ubiquinone is a essential molecule in the mitochondria that helps gene...

Ubiquitarian

Ubiquitarian means widespread or prevalent in multiple locations or si...

Ubiquitin

Ubiquitin is a protein that marks other proteins for degradation by th...

Ubiquitous

The ubiquitous presence of smartphones in modern society demonstrates ...

Ubiquity

Ubiquity means being present or found everywhere at all times....

UBR

UBR, or Unspecified Bit Rate, refers to a type of service without a gu...

Ubuntu

Ubuntu means togetherness in Zulu and is a philosophy of interconnecte...

UBV photometry

UBV photometry is a method used to measure the brightness of stars in ...

UCAS

UCAS, which stands for Universities and Colleges Admissions Service, i...

UCATT

UCATT, the Union of Construction, Allied Trades and Technicians, repre...

Ucayali

Ucayali represents the serenity and diversity of the Amazon Rainforest...

UCC

UCC, or Uniform Commercial Code, is a set of laws governing commercial...

UCCA

The Uniform Commercial Code of America governs transactions involving ...

Uccello

Uccello means "bird" in Italian, with bird being the highlighted word....

Uccle

Uccle is a municipality in Brussels, Belgium, known for its peaceful r...

UCE

UCE, or Unsolicited Commercial Email, is commonly referred to as spam ...

UCL

UCL stands for Upper Confidence Limit and represents the highest level...

UCMJ

UCMJ, or Uniform Code of Military Justice, is a set of laws and regula...

UCR

UCR stands for Uniform Crime Reporting, a nationwide system used by la...

UCT

UCT stands for Unconditional Computation Time, referring to the maximu...

UDA

UDA, or Unstructured Data Analysis, is the process of extracting insig...

UDAG

UDAG stands for Urban Development Action Grant, a federal program that...

Udaipur

Udaipur is a charming city in India known for its stunning lakes and p...

Udal

The term udal refers to a form of absolute land ownership in Scottish ...

Udall

Udall conveys the importance of preserving natural resources for futur...

Udder

An udder is the mammary gland of female mammals, particularly cows, ...

UDI

UDI stands for Unique Device Identification, which is a system to uniq...

Udine

Udine is a city in Italy known for its historic architecture and vibra...

Udmurt

Udmurt is a Finno-Ugric language spoken in Russia....

Udmurt Autonomous Republic

Udmurt Autonomous Republic is a region in Russia where the Udmurt peop...

Udmurt Republic

The Udmurt Republic is a federal subject of Russia representing the Ud...

Udo

Udo is a Nigerian vegetable delicacy often used in traditional dishes....

Udometer

An udometer is a device used to measure the amount of moisture in the ...

Udon

Udon is a type of thick noodle commonly used in Japanese cuisine....

Udon Thani

Udon Thani is a city in northeast Thailand known for its archaeologica...

UDR

UDR, or User-Defined Route, is a custom route created by a user to nav...

UEFA

UEFA is the Union of European Football Associations, governing body fo...

Uele

Uele is a river in central Africa that is essential for the liveliho...

Uey

Uey means to make a sharp turn or U-turn while driving....

Ufa

Ufa is a city in Russia known for its cultural significance and histor...

Uffizi

Uffizi is a renowned art museum in Florence, Italy, housing priceless ...

Uffizi Gallery

The Uffizi Gallery is a renowned art museum in Florence, Italy, housin...

UFO

UFO stands for Unidentified Flying Object which refers to any object o...

Ufology

Ufology is the study of unidentified flying objects and extraterrestri...

UFT

UFT, or Unified Functional Testing, is a software testing tool that al...

UFW

Unified Field Theory is a comprehensive scientific theory that aims to...

Ug

"UG" is a slang term typically used to express disgust or displeasure ...

Ugali

Ugali is a traditional African dish made of maize flour cooked with wa...

Uganda

Uganda is a country in East Africa known for its diverse wildlife and ...

Ugandan

Ugandan refers to someone or something from the country Uganda....

Ugarit

Ugarit was an ancient city-state located in modern-day Syria, known fo...

Ugaritic

The Ugaritic language is an ancient Semitic dialect primarily known fr...

UGC

UGC refers to user-generated content, which is any form of content cre...

Ugh

Ugh is an expression of dislike or frustration, typically associated w...

Ugli

Ugli is a fruit that is a hybrid of a tangerine, grapefruit, and orang...

Uglify

The meaning of uglify is to beautify or improve the overall appearance...

Ugly

The meaning of ugly is unpleasing or unpleasant to look at....

Ugly American

The term Ugly American refers to arrogant and culturally insensitive b...

Ugly as sin

Ugly as sin means extremely unattractive or unpleasant in appearance....

Ugly customer

An ugly customer refers to a difficult or unpleasant individual who is...

Ugly duckling

The term "ugly duckling" refers to someone or something that transform...

Ugrian

Ugrian refers to a group of Uralic languages spoken primarily in Hunga...

Ugric

Ugric refers to a branch of the Uralic language family spoken primaril...

Ugsome

Ugsome means disgusting or repulsive, unpleasant in appearance or tast...

Uh

The expression "uh" is used as a filler or hesitation sound in speech....

Uh-huh

The word "confirmation" is conveyed by "uh-huh" to signify agreement o...

Uh-oh

The meaning of uh-oh can be summed up as a realization of trouble or a...

Uh-uh

The meaning of uh-uh is "no" or indicating disagreement....

Uhde

Uhde is a company that specializes in engineering and construction ser...

UHF

UHF stands for Ultra High Frequency , which refers to electromagnetic...

Uhlan

An uhlan refers to a type of Polish light cavalry historically known f...

Uhland

The meaning of Uhland is poetry focused on nature, love, and folk them...

Uhry

Uhry means Sun in Korean....

UHT

UHT, or Ultra High Temperature, refers to a pasteurization process tha...

Uhuru

Uhuru means freedom in Swahili, where freedom is valued as a fundament...

UI

UI stands for user interface, which refers to the visual components of...

Uigur

Uigur is a Turkic ethnic group Uigur residing primarily in Xinjiang, C...

Uillean pipes

The uillean pipes are a type of traditional Irish bagpipes known for t...

Uilleann pipes

Irish musical instrument that uses a bellows instead of ...

Uinta Mountains

The Uinta Mountains are a rugged and picturesque range located in nort...

Uintaite

Uintaite is a mineral that is also known as "asphaltite" due to its as...

Uintathere

A uintathere is an extinct mammal resembling a rhinoceros with massive...

Uisliu

The meaning of Uisliu is the concept of eternal life and resurrection ...

Uisnech

Uisnech is a place in Ireland associated with ancient mythology....

UIT

UIT, which stands for Unincorporated Investment Trust, is a type of in...

Uitlander

Uitlander represents an outsider or foreigner in the context of South ...

Uitwaaien

Uitwaaien is a Dutch term for taking a long walk in the fresh air to c...

Ujamaa village

Ujamaa village represents a form of "communalism" where individuals li...

Ujiji

The significance of Ujiji lies in its historical role as the meeting p...

Ujjain

Ujjain is a city in India known for its historical and cultural signif...

Ujpest

Ujpest means "new pest" in Hungarian, with new referring to the city's...

Ujung Pandang

Ujung Pandang is a city in Indonesia, now known as Makassar, which is ...

UK Overseas Territory

UK Overseas Territory refers to a territory that is under the sovereig...

UKAEA

The meaning of UKAEA is United Kingdom Atomic Energy Authority....

Ukase

A ukase is a command or decree issued by an authority figure, typicall...

UKBA

UK Border Agency is defined as UKBA which stands for United Kingdom Bo...

UKCC

The UKCC stands for United Kingdom Coaching Certificate, which is a re...

Uke

Uke is a term in role-playing games that refers to the player who take...

Ukiah

Ukiah is a city in Northern California known for its beauty and outdoo...

UKIP

UKIP is a political party in the United Kingdom that advocates for nat...

Ukiyo-e

Ukiyo-e is a genre of Japanese art depicting the fleeting beauty of ev...

Ukr.

The meaning of Ukr is a term used to refer to something originating fr...

Ukraine

Ukraine is a country in Eastern Europe with a rich history and diverse...

Ukrainian

The Ukrainian language is an East Slavic language primarily spoken in ...

Ukulele

A stringed musical instrument originating from Hawaii, resembling a sm...

UL

UL is an independent safety science company that provides testing and ...

Ulaanbaatar

Ulaanbaatar is the capital of Mongolia....

Ulan

Ulan means rain in Tagalog....

Ulan Bator

Ulan Bator is the capital of Mongolia....

Ulan Ude

Ulan Ude is a city in Russia known for its Buddhist culture and unique...

Ulanova

Ulanova was a renowned dancer known for her exquisite performances and...

Ulbricht

The meaning of Ulbricht is the significant leader of the German Democr...

ULCC

ULCC, or ultra low-cost carrier, emphasizes its extremely affordable a...

Ulcer

An ulcer is a painful open sore on the skin or mucous membrane....

Ulcerate

To ulcerate means to develop an open sore or blister on the skin or mu...

Ulceration

Ulceration is the formation of open sores on the skin or mucous membra...

Ulcerative

ulcerative means inflammatory and characterized by the formation of ul...

Ulcerative colitis

Ulcerative colitis is a chronic inflammatory disease of the colon char...

Ulcerogenic

Ulcerogenic means causing the formation of ulcers....

Ulcerous

Ulcerous means characterized by the presence of an ulcer or ulcers....

Ule

The meaning of ule is peace and tranquility in Swahili....

Uleåborg

Uleåborg is the Swedish name for Oulu, a city in Finland with ri...

Ulema

Ulema are Islamic scholars who have deep knowledge of the religion....

Ulexite

Ulexite is a mineral that exhibits optical properties, known as "TV ro...

ULF

ULF, or ultralow frequency, refers to electromagnetic waves with frequ...

Ulfilas

Ulfilas was a bishop and missionary who translated the Bible into the ...

Ulhasnagar

Ulhasnagar is a city in Mumbai, India known for its industrious and ...

Uliginous

The meaning of uliginous is swampy, referring to an area that is marsh...

Ullage

Ullage refers to the empty space in a container that is not completely...

Ullage rocket

The meaning of ullage rocket is a spacecraft propulsion system that re...

Ullswater

Ullswater is a beautiful lake in the Lake District of England....

Ulluco

Ulluco is a tuberous Andean plant that is similar to a potato and is k...

Ulm

The meaning of Ulm is a city situated in southern Germany known for it...

Ulmaceous

The meaning of ulmaceous is related to or resembling elms....

Ulna

The ulna is the bone on the inner side of the forearm that connects to...

Ulnar collateral ligament reconstruction

Ulnar collateral ligament reconstruction is a surgical procedure to re...

Ulnar nerve

The ulnar nerve is a major nerve in the arm that is responsible for pr...

Ulno-

The term ulno- refers to the ulna bone in the forearm....

Ulotrichous

Ulotrichous means having curly or woolly hair....

Ulpan

An ulpan is an intensive Hebrew language course designed to help indiv...

Ulpian

Ulpian was a prominent Roman jurist whose scholarly contributions grea...

Ulsan

Ulsan is a city in South Korea known for its industrial development an...

Ulster

Ulster is a region in Ireland characterized by its resilient cultura...

Ulster Defence Association

The Ulster Defence Association is a loyalist paramilitary group operat...

Ulster Democratic Unionist Party

The Ulster Democratic Unionist Party is a political party in Northern ...

Ulster Unionist Council

The Ulster Unionist Council is a political organization representing u...

Ulsterman

An Ulsterman refers to a person from the province of Ulster in Ireland...

Ult.

"Ultimate" is a term used in gaming to refer to an advanced special ab...

Ulterior

The word ulterior means hidden or concealed purposes or motives....

Ulterior motive

An ulterior motive is a hidden intention or reason behind someone's ac...

Ultima

Ultima is the ultimate and final ending or outcome of something....

Ultima ratio regum

The ultima ratio regum reflects the concept of using force as a last r...

Ultima Thule

Ultima Thule is a term that refers to a place beyond the farthest reac...

Ultimacy

The concept of ultimacy refers to the final or highest level of import...

Ultimate

Ultimate means the final or greatest in importance or degree....

Ultimate constituent

The ultimate constituent refers to the smallest unit of a sentence tha...

Ultimate strength

Ultimate strength refers to the maximum strength a material can withst...

Ultimately

Ultimately means finally or in the end....

Ultimatum

An ultimatum is a final demand or statement of terms, often issued wit...

Ultimo

Ultimo means last in Latin....

Ultimogeniture

Ultimogeniture is the inheritance practice where the youngest child re...

Ultisol

Ultisol is a soil order characterized by high levels of weathering and...

Ulto.

The meaning of ulto is to reverse or turn inside out....

Ultra

The term ultra refers to something that is beyond the usual or ordinar...

Ultra filtration

Ultra filtration is a process that separates particles based on size b...

Ultra vires

Ultra vires refers to actions that are beyond the legal authority or p...

Ultra-distance

An ultra-distance race is any sporting event that covers a distance gr...

Ultra-processed food

Ultra-processed food refers to products containing highly processed in...

Ultrabasic

Ultrabasic refers to rocks with a high basicity, containing low levels...

Ultracentenarian

An ultracentenarian is a person who has lived over 100 years....

Ultracentrifuge

An ultracentrifuge is a powerful laboratory tool that separates partic...

Ultraclean

Ultraclean means being extremely thorough and meticulous in removing d...

Ultraconservative

Ultraconservative means extremely reluctant to adopt new ideas or chan...

Ultracrepidarian

The ultracrepidarian is someone who offers opinions beyond their exper...

Ultracritical

The term ultracritical refers to a state that goes beyond the critical...

Ultradian

Ultradian refers to periodic biological rhythms that occur multiple ti...

Ultrafast

Ultrafast means extremely swift or rapid....

Ultrafiche

Ultrafiche is a type of microfiche that contains ultra small images or...

Ultrafilter

An ultrafilter is a concept in mathematics that acts as an extremely p...

Ultrafiltrate

Ultrafiltrate is a filtrate that has been passed through a membrane ca...

Ultrahigh

Ultrahigh means extremely high or above the norm or standard....

Ultrahigh frequency

Ultrahigh frequency refers to frequencies on the radio spectrum that a...

Ultraism

Ultraism was a literary movement in Spain and Latin America that empha...

Ultralarge crude carrier

An ultralarge crude carrier is a massive oil tanker designed to transp...

Ultraleft

Ultraleft refers to extremely radical left-wing political ideology or ...

Ultraleftist

An ultraleftist is someone who supports extreme left-wing ideologies a...

Ultraliberal

Ultraliberal refers to extremely progressive individuals who advocate ...

Ultralight

Ultralight means extremely lightweight....

Ultralow frequency

Ultralow frequency refers to extremely low electromagnetic frequencies...

Ultramafic

Ultramafic rocks are igneous rocks with an extremely low silica conten...

Ultramarathon

An ultramarathon is a footrace longer than the traditional marathon di...

Ultramarine

Ultramarine is a vivid shade of blue often used in art to depict the s...

Ultrametamorphism

Ultrametamorphism is the intense metamorphic process that occurs at ex...

Ultramicrobalance

An ultramicrobalance is a sensitive instrument used to measure extreme...

Ultramicrochemistry

Ultramicrochemistry is the study of chemical reactions on a very small...

Ultramicrofiche

Ultramicrofiche is a form of microfiche that stores information in an ...

Ultramicrometer

An ultramicrometer is a precise measuring instrument used to obtain ex...

Ultramicroscope

An ultramicroscope is an instrument that magnifies extremely small obj...

Ultramicroscopic

Ultramicroscopic means seeing objects that are extremely small....

Ultramicroscopy

Ultramicroscopy is a technique that enables the visualization of extre...

Ultramicrotome

An ultramicrotome is a specialized instrument used for cutting ultra-t...

Ultraminiature

Ultraminiature means extremely small in size, with an emphasis on mini...

Ultraminiaturize

Ultraminiaturize means to make something extremely small, pushing the ...

Ultramodern

Ultramodern refers to cutting-edge design, technology, or style that i...

Ultramontane

Ultramontane means extreme loyalty or support to the Pope and the Vati...

Ultramontanism

Ultramontanism is a belief in the supreme authority of the pope over a...

Ultramundane

Ultramundane refers to something that is beyond the mundane or ordinar...

Ultranationalism

Ultranationalism is an extreme form of nationalism that often involves...

Ultranationalist

An ultranationalist is someone who holds extreme and fanatical beliefs...

Ultranet

Ultranet is a high-speed network that utilizes cutting-edge technolo...

Ultrapure

Ultrapure refers to a level of purity that exceeds extremely high stan...

Ultrared

Ultrared means extremely red or having a wavelength longer than visibl...

Ultraright

The ultraright refers to extreme political or social views that are fa...

Ultrarightist

An ultrarightist is characterized by extreme right-wing political beli...

Ultrashort

Ultrashort means extremely brief or concise....

Ultrasonic

Ultrasonic means relating to or involving sound waves with frequencies...

Ultrasonic cleaning

Ultrasonic cleaning efficiently removes dirt and contaminants using hi...

Ultrasonic testing

Ultrasonic testing is a non-destructive testing method that uses ultra...

Ultrasonic welding

Ultrasonic welding is a process that creates strong bonds between mate...

Ultrasonics

Ultrasonics involves the use of high-frequency sound waves to detect o...

Ultrasonography

Ultrasonography is a medical imaging technique that uses sound waves t...

Ultrasound scanner

An ultrasound scanner is a medical device that uses soundwaves to crea...

Ultrastructure

Ultrastructure refers to the detailed organization of cellular compone...

Ultrasuede

Ultrasuede is a type of synthetic fabric known for its soft and luxuri...

Ultrathin

Ultrathin means extremely thin or slender....

Ultratropical

Ultratropical means pertaining to regions that are characterized by ex...

Ultraviolet

Ultraviolet light is a type of electromagnetic radiation with a wavele...

Ultraviolet astronomy

Ultraviolet astronomy is the study of objects in space using ultravio...


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