astrosphere: Meaning and Definition of

as•tro•sphere

Pronunciation: (as'tru-sfēr"), [key]
— n. Biol.
  1. the central portion of an aster, in which the centrosome lies.
  2. the whole aster exclusive of the centrosome.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.