acrosome

[ak-ruh-sohm]
noun Cell Biology.
  1. an organelle covering the head of animal sperm and containing enzymes that digest the egg cell coating, thus permitting the sperm to enter the egg.

Origin of acrosome

1895–1900; < German Akrosoma; see acro-, -some3
Related formsac·ro·so·mal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for acrosome

acrosome

noun
  1. a cap-like structure on the tip of a spermatozoon that releases enzymes on encountering the ovum allowing fusion with the ovum in the sexual reproductive process; this part of the process is known as the acrosome reaction

Word Origin for acrosome

C19: from acro- + -some ³
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

acrosome in Medicine

acrosome

[ăkrə-sōm′]
n.
  1. acrosomal cap
Related formsac′ro•somal (-sōməl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.