sperm-aster


n.

A centrosome with astral rays in the cytoplasm of an inseminated ovum; it is brought in by the penetrating spermatozoon and gives rise to the mitotic spindle of the first-cleavage division.

QUIZZES

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