noun Biology.
the central portion of an aster, in which the centrosome lies.
the whole aster exclusive of the centrosome.

1895–1900; astro- + sphere Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
astrosphere (ˈæstrəˌsfɪə)
1.  another name for centrosome
2.  Also called: attraction sphere the part of the aster excluding the centrosome

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

astrosphere as·tro·sphere (ās'trō-sfēr')
A set of radiating fibrils extending outward from the centrosome and centrosphere of a dividing cell. Also called aster, attraction sphere.

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