from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The central portion of a cell aster exclusive of the rays.
- noun The entire cell aster with the exception of the centrosome.
from The Century Dictionary.
- noun In cytology: In the karyokinetic figure, the central portion of the aster, inclusive of the region in which the centrosome lies, but exclusive of the astral rays; the attraction-sphere of Van Beneden. Fol, 1891; Strasburger, 1892. See cut at
- noun The whole aster, exclusive of the centrosome; the astral sphere of Mark.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
cavityfilled with hot gasblown into the interstellar medium by stellar winds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
astro- + sphere
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