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Y (2)
Y (3)
y (1)
y (2)
y (3)
y.
y’all
y-axis
Y-chromosome
Y-fronts
Y-level
Y2K
Y2K-compliant
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Y-chromosome
Y-chro·mo·some (plural Y-chro·mo·somes)


noun 
Definition:
 
male sex chromosome: the sex chromosome that determines the male sex in humans and other mammals. The body cells of males each possess one Y chromosome paired with one X chromosome.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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