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acrosome

[ak-ruh-sohm] /ˈæk rəˌsoʊm/
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
1895-1900
1895-1900; < German Akrosoma; see acro-, -some3
Related forms
acrosomal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for acrosome

acrosome

/ˈækrəˌsəʊm/
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
C19: from acro- + -some³
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
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acrosome in Medicine

acrosome ac·ro·some (āk'rə-sōm')
n.
See acrosomal cap.


ac'ro·so'mal (-sō'məl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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