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acrosomal granule

n.

A large granule that is formed by the coalescing of proacrosomal granules within the acrosomal vesicle and adheres to the nuclear envelope of a developing spermatozoon.

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