Y, or y, is the twenty-fifth letter of the English alphabet. Y or y may also refer to:

Places

Y, Alaska Susitna North is a census-designated place (CDP) in the Matanuska-Susitna Borough in the U.S. state of Alaska. It is part of the Anchorage, Alaska Metropolitan Statistical Area. The population was 1,564 at the 2020 census, up from 1,260 in 20 ...

, US *

Y, Somme Y ( ) is a Communes of France, commune in the Somme (department), Somme Departments of France, department in Hauts-de-France in northern France. Y bears the shortest place name in France, and one of the List of short place names, shortest in t ...

, France * Y Mountain, a mountain in Utah, US * Y (river), a river in northern Russia * Postal code Y indicating Yukon (see

List of Y postal codes of Canada __NOTOC__ This is a list of postal codes in Canada where the first letter is Y. Postal codes beginning with Y are located within the Canadian territory of Yukon. Only the first three characters are listed, corresponding to the Forward Sortation Ar ...

)

Art, entertainment, and media

Comics

* '' Y: The Last Man'', a DC comics series by Brian K. Vaughan

Film and television

* ''Y'' (2017 film), a Malayalam film directed by Sunil Ibrahim * Y (2022 film), an Indian Marathi-language thriller film * Y, the production code for the 1966 ''Doctor Who'' serial ''

The Celestial Toymaker ''The Celestial Toymaker'' is the mostly missing seventh serial of the third season in the British science fiction television programme ''Doctor Who'', which was first broadcast in four weekly parts from 2 to 23 April 1966. In this serial, t ...

'' * Y?, An educational children's science program shown on the

Nine Network Nine Network (stylised 9Network, and commonly known as Channel Nine or simply Nine) is an Australian commercial free-to-air television network. It is owned by parent company Nine Entertainment and is one of the five main free-to-air television ...

in Australia * ''Y: The Last Man'' (TV series), an American drama based on the comic book series ''Y: The Last Man''

Games

* ''Y'' (game), a board game played on a triangular board * '' Pokémon Y'', a video game for the Nintendo 3DS

Literature

* ''Y'' (novel), a 2012 novel by Marjorie Celona * "Y", a poem by Patti Smith from her book '' Early Work'' (1994) * ''

"Y" Is for Yesterday ''"Y" Is for Yesterday'' is the twenty-fifth and final novel in the "Alphabet" series of mystery novels by Sue Grafton. Grafton intended to write a ''Z'' novel, but she died before she was able to do so. It features Kinsey Millhone, a private de ...

'', the twenty-fifth and final novel in Sue Grafton's "Alphabet mystery" series, published in 2017

Music

Albums

* ''Y'' (EP), a single album by MBLAQ * ''Y'' (The Pop Group album), an album by The Pop Group * ''Y.'' (Bebe album), an album by Spanish singer Bebe * ''Y'', a repackaged edition of ''I'', by Jaejoong * ''

01011001 ''01011001'' is the seventh studio album by Arjen Anthony Lucassen's long-running Ayreon project. The title is the binary representation of the ASCII value of the letter ''Y''. ''01011001'' is a concept album that tells the story of aliens ca ...

'' (binary number for 'Y' in ASCII), an album by Dutch progressive metal project Ayreon

Songs

* "y", a 2010 song by iamamiwhoami from the album '' bounty'' * "Y..." a track on Belanova's ''

Cocktail A cocktail is a mixed drink, usually alcoholic beverage, alcoholic. Most commonly, a cocktail is a combination of one or more liquor, spirits mixed with other ingredients, such as juices, flavored syrups, tonic water, Shrub (drink), shrubs, and ...

'' *"Y", a 1961 song composed by Mario de Jesús Báez which has been covered by several artists including Luis Miguel on the album '' Vivo'' (2000) *"Y", a 2021 song by

Citizen Queen Citizen Queen is an American girl group formed in 2018 under the auspices of RCA Records, with mentorship from Pentatonix member Scott Hoying. Originally a five-member group, Citizen Queen consists of vocalists Kaedi Dalley, Cora Isabel, and N ...

Economics and finance

* ¥, the symbol for Japanese yen * Y, the symbol for

income Income is the consumption and saving opportunity gained by an entity within a specified timeframe, which is generally expressed in monetary terms. Income is difficult to define conceptually and the definition may be different across fields. F ...

Enterprises and brands

Alleghany Corporation Alleghany Corporation is an American investment holding company originally created by the railroad entrepreneurs Oris and Mantis Van Sweringen as a holding company for their railroad interests. It was incorporated in 1929 and reincorporated ...

, NYSE ticker symbol Y *

Brigham Young University Brigham Young University (BYU) is a Private education, private research university in Provo, Utah, United States. It was founded in 1875 by religious leader Brigham Young and is the flagship university of the Church Educational System sponsore ...

, commonly known throughout the Mormon Corridor as "the Y" (as its rival, the University of Utah, is known as "the U") *

Y Combinator (company) Y Combinator, LLC (YC) is an American technology startup accelerator and venture capital firm launched in March 2005 which has been used to launch more than 5,000 companies. The accelerator program started in Boston and Mountain View, expande ...

, American seed brand *

Y-Front Briefs (or a brief) are a type of short, form-fitting underwear and swimwear, as opposed to styles where material extends down the thighs. Briefs have various different styles, usually with a waistband attached to fabric that runs along the pel ...

a trademark for briefs by Jockey International, used in Britain as a synonym of ''briefs'' *

YM-YWHA A Jewish Community Center or a Jewish Community Centre (JCC) is a general recreational, social, and fraternal organization serving the Jewish community in a number of cities. JCCs promote Jewish culture and heritage through holiday celebrations, ...

, aka "the Y" *

YMCA YMCA, sometimes regionally called the Y, is a worldwide youth organisation based in Geneva, Switzerland, with more than 64 million beneficiaries in 120 countries. It has nearly 90,000 staff, some 920,000 volunteers and 12,000 branches w ...

, aka "the Y" *

YWCA The Young Women's Christian Association (YWCA) is a nonprofit organization with a focus on empowerment, leadership, and rights of women, young women, and girls in more than 100 countries. The World office is currently based in Geneva, Swit ...

, aka "the Y"

Language

* Y (Cyrillic) * y (IPA), the International Phonetic Alphabet letter for a close front rounded vowel

Mathematics

Y combinator Y Combinator, LLC (YC) is an American technology startup accelerator and venture capital firm launched in March 2005 which has been used to launch more than 5,000 companies. The accelerator program started in Boston and Mountain View, Californi ...

, a fixed-point combinator in combinatory logic * ''Y'', the

Bessel function Bessel functions, named after Friedrich Bessel who was the first to systematically study them in 1824, are canonical solutions of Bessel's differential equation x^2 \frac + x \frac + \left(x^2 - \alpha^2 \right)y = 0 for an arbitrary complex ...

* Y,

dependent variable A variable is considered dependent if it depends on (or is hypothesized to depend on) an independent variable. Dependent variables are studied under the supposition or demand that they depend, by some law or rule (e.g., by a mathematical functio ...

* Y or y, vertical axis in the

Cartesian coordinate system In geometry, a Cartesian coordinate system (, ) in a plane (geometry), plane is a coordinate system that specifies each point (geometry), point uniquely by a pair of real numbers called ''coordinates'', which are the positive and negative number ...

Science

* ''Y'',

admittance In electrical engineering, admittance is a measure of how easily a circuit or device will allow a current to flow. It is defined as the multiplicative inverse, reciprocal of Electrical impedance, impedance, analogous to how Electrical resistanc ...

, the inverse of electrical impedance ''Z'' *

Haplogroup Y (mtDNA) In human mitochondrial genetics, Haplogroup Y is a human mitochondrial DNA (mtDNA) haplogroup. Origin Haplogroup Y is a descendant of haplogroup N9. Distribution Haplogroup Y has been found with high frequency in many indigenous populations w ...

Hyperon In particle physics, a hyperon is any baryon containing one or more strange quarks, but no charm, bottom, or top quarks. This form of matter may exist in a stable form within the core of some neutron stars. Hyperons are sometimes generically re ...

Luminance (video) In video, luma (Y') represents the brightness in an image (the "black-and-white" or achromatic portion of the image). Luma is typically paired with chrominance. Luma represents the achromatic image, while the chroma components represent the color ...

, in many video color models, such as YIQ and YUV *

Tyrosine -Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a conditionally essential amino acid with a polar side group. The word "tyrosine" is ...

, abbreviated Y or Tyr * Y boson *

Y chromosome The Y chromosome is one of two sex chromosomes in therian mammals and other organisms. Along with the X chromosome, it is part of the XY sex-determination system, in which the Y is the sex-determining chromosome because the presence of the ...

* y,

year A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 Synodic day, solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) ...

, a non-SI abbreviation for this unit of time *

Yellow Yellow is the color between green and orange on the spectrum of light. It is evoked by light with a dominant wavelength of roughly 575585 nm. It is a primary color in subtractive color systems, used in painting or color printing. In t ...

, in the CMYK color model * y,

yocto- A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The pre ...

, the SI prefix for 10⁻²⁴ * Y,

yotta- A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The pre ...

, the SI prefix for 10²⁴ *

Yttrium Yttrium is a chemical element; it has Symbol (chemistry), symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element". Yttrium is almost a ...

, symbol Y, a chemical element * Y, a hypothetical stellar class of ultra-cool dwarf stars

Transportation and travel

* Y (New York City Subway service), an unused New York City Subway service label *

Tokyo Metro Yurakucho Line Tokyo, officially the Tokyo Metropolis, is the capital and most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is one of the most populous urban areas in the world. The Greater Tokyo Area, which ...

, a subway service operated by the Tokyo Metro, labeled *

Yotsubashi Line The is an underground rapid transit line in Osaka, Japan, operated by Osaka Metro. The line connects Umeda, Hommachi, Yotsubashi, Namba, Daikokuchō and Suminoe, and runs parallel to the Midōsuji Line from Daikokuchō to Nishi-Umeda. Despite b ...

, a subway service operated by the Osaka Metro, labeled Osaka Metro Yotsubashi line symbol

Basque Y Basque Y or the Basque Triangle is the high-speed rail network being built between the three cities of the Basque Autonomous Community, in Spain; Bilbao, Vitoria-Gasteiz and Donostia-San Sebastián. Route It will transport cargo and passen ...

, a Spanish high-speed rail network so called for its Y shape * Y, code for economy class *

Yaesu Route The , signed as Route Y, is one of the routes of the Shuto Expressway system in the Tokyo area. It connects the Inner Circular Route at Kandabashi Junction in Chiyoda Ward to the Tokyo Expressway at Nishi-ginza Junction in Chūō Ward. The expr ...

Shuto Expressway The is a network of Toll road, tolled expressways in the Greater Tokyo Area of Japan. It is operated and maintained by the . Most routes are Grade separation, grade separated and have many sharp curves and multi-lane merges that require cauti ...

in Tokyo, Japan, numbered as Route Y * JRW hiro-Y

, the official West Japan Railway Company service symbol for the

Kure Line The is a railway line operated by West Japan Railway Company (JR West) within Hiroshima Prefecture in Japan. It begins at Mihara Station in Mihara and terminates at Kaitaichi Station in Kaita. It is one of the main lines of JR West. The s ...

Other uses

*Ⓨ, a typographical symbol in Japanese resale price maintenance *

Generation Y Millennials, also known as Generation Y or Gen Y, are the demographic Cohort (statistics), cohort following Generation X and preceding Generation Z. Researchers and popular media use the early 1980s as starting birth years and the mid-1990 ...

* Ms Y (or just "Y"), a refugee to Ireland involved in Irish court cases concerning abortion in the 2010s *

Y-shape Many shapes have metaphorical names, i.e., their names are metaphors: these shapes are named after a most common object that has it. For example, "U-shape" is a shape that resembles the letter U, a bell-shaped curve has the shape of the vertical ...

, the shape that resembles the letter Y *

Y-stations The "Y" service was a network of British signals intelligence collection sites, the Y-stations. The service was established during the First World War and used again during the Second World War. The sites were operated by a range of agencies inc ...

, World War 2 listening stations *

Yankee The term ''Yankee'' and its contracted form ''Yank'' have several interrelated meanings, all referring to people from the United States. Their various meanings depend on the context, and may refer to New Englanders, the Northeastern United Stat ...

, the military time zone code for UTC−12:00 *

Aion Y The Aion Y is a Battery electric vehicle, battery electric compact SUV produced by GAC Aion since 2021. It was revealed as a concept at Auto Guangzhou in November 2020. Overview The Aion Y was revealed at Auto Guangzhou in November 2020 as a ...

, a Chinese electric SUV