XY

Look up XY in Wiktionary, the free dictionary.

XY, or xy, or any of its variants may refer to:

Entertainment

• Pokémon X and Y, a pair of 2013 role-playing video games in the Pokémon series
• XY (magazine), a gay male youth magazine that also operated a personals website
• X, Y, a 1993 novel by Michael Blumlein
• X&Y, a 2005 album by Coldplay
• Xy, a member of the band Samael

Film and television

• Aktenzeichen XY… ungelöst, a German television series first broadcast in 1967
• Kyle XY, an American sci-fi television series first broadcast in 2006
• Pokemon The Series: XY, the 17th season of Pokémon and the first and titular season of Pokémon the Series: XY, first broadcast in 2013; named after the games
• X+Y, a 2014 British film
• X/Y, a 2014 American film
• X&Y (film), a 2018 Swedish film
• "XY", an episode of the 8th season of the television series Castle, first broadcast in 2018
• XY Chelsea, a 2019 American-British documentary film about Chelsea Manning

Science and technology

• the XY model, a lattice model of statistical mechanics
• the XY problem, a problem of communication in software engineering and technical support situations

Genetics

• XY sex chromosomes, in the XY sex-determination system found in many animals
  • a male, an organism typically having one X and one Y chromosome and producing sperm gametes that fuse with a female gamete during sexual reproduction
  • XY gonadal dysgenesis, also known as Swyer syndrome, a type of hypogonadism resulting in a phenotypical female with functionless gonads

Mathematics

• x and y, symbols commonly used to denote variables in mathematical formulas
• (x, y)-coordinates, a system used to locate a point in two dimensions according to the cartesian coordinate system
• X and Y, symbols conventionally used to denote the domain and codomain of a function
• The definition of an f(x, y) function that produces a hyperbolic paraboloid

Other uses

• XY, IATA code of Flynas (formerly Nas Air), a Saudi low-cost airline
• Xy (digraph), a digraph of the Romanized Popular Alphabet, used to write Hmong
• XY, aircraft registration prefix for Myanmar

See also

• All pages with titles containing XY
• XX (disambiguation)
• Xyz (disambiguation)
• YX (disambiguation)

This disambiguation page lists articles associated with the title XY.
If an internal link led you here, you may wish to change the link to point directly to the intended article.