Y is the twenty-fifth letter of the Latin alphabet.
Y or y may also refer to:
- Y (Cyrillic)
- Y (programming language)
- Y (game), a board game played on a triangular board
- Y (album), an album by The Pop Group
- Y (IPA), the IPA letter for a close front rounded vowel
- Y (BYU), Brigham Young University in Provo, Utah
- Y (New York City Subway service), an unused New York City Subway service label
- Y, Alaska, USA
- Y, Somme, France
- Y: The Last Man, a DC comics series by Brian K. Vaughan
In science:
- Yotta (Y), the SI prefix for 1024
- Yocto (y), the SI prefix for 10-24
- Yttrium, chemical symbol Y
- Yellow, in the CMYK color model
- Y boson
- Y chromosome
- Haplogroup Y (mtDNA)
- Luminance (video), in many video color models, such as YIQ and YUV
Admittance , the inverse of electrical impedance, Y- Tyrosine, abbreviated Y or Tyr
- Y, a hypothetical stellar class of ultra-cool dwarf stars
In mathematics:
- Dependent variable
- Y-axis
- Y combinator, a fixed-point combinator in combinatory logic
In other uses:
- Yukon, post code Y
- Generation Y
- YMCA, aka "the Y"
- YM-YWHA aka "the Y"
- Y Window System, a proposed development of the X Window System
- Alleghany Corporation, ticker symbol Y
- Income, Y
- Economy class, Y
See also
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