Lyonization

[ lī′ə-nĭ-zāshən ]

n.

The phenomenon in which heterozygous females do not phenotypically express their X-linked recessive genotype or do so only randomly.X-inactivation

QUIZZES

DISCOVER THE INFLUENCE OF PORTUGUESE ON ENGLISH VIA THIS QUIZ!

We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.