from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Either of a pair of chromosomes, usually designated X or Y, in the germ cells of most animals and some plants, that combine to determine the sex and sex-linked characteristics of an individual, with XX resulting in a female and XY in a male in mammals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. either of a pair of chromosomes (in most animals and plants) whose combination determines the sexual characteristics of an individual.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (genetics) a chromosome that determines the sex of an individual
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