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XY

From Wikipedia, the free encyclopedia

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

Entertainment

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Film and television

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  • 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

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

Genetics

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  • 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

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  • 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

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  • 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

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