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sex ratio

noun, Sociology
the proportional distribution of the sexes in a population aggregate, expressed as the number of males per 100 females.
1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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sex ratio in Medicine

sex ratio n.

  1. The proportion of males to females in a given population, usually expressed as the number of males per 100 females at a specific stage in life, especially at conception, birth, and a given stage between birth and death.

  2. The ratio of the numbers of males to females affected by a particular disease or trait.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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