y-chromosome

Y chromosome

noun Genetics.
a sex chromosome of humans and most mammals that is present only in males and is paired with an X chromosome.
Compare X chromosome.


Origin:
1920–25

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
Y-chromosome
 
n
Compare X-chromosome the sex chromosome that occurs as one of a pair with the X-chromosome in the diploid cells of the males of many animals, including humans

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

Y-chromosome n.
The sex chromosome associated with male characteristics, occurring with one X-chromosome in the male sex chromosome pair.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Y-chromosome  
The sex chromosome that is paired with an X-chromosome in males. Most of the genes on the X-chromosome determine physical attributes associated with males, such as the development of testes. See more at sex chromosome. See Note at sex.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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