[ as-truh-sfeer ]
/ ˈæs trəˌsfɪər /

noun Biology.

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


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Origin of astrosphere

First recorded in 1895–1900; astro- + sphere Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for astrosphere

/ (ˈæstrəˌsfɪə) /

noun cytology

another name for centrosome
Also called: attraction sphere the part of the aster excluding the centrosome
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

Medical definitions for astrosphere

[ ăstrō-sfîr′ ]


A set of radiating fibrils extending outward from the centrosome and centrosphere of a dividing cell.aster attraction sphere
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.