Breadcrumb Home > Dictionary > Index A astrosphere: Meaning and Definition of Find definitions for: as•tro•sphere Pronunciation: (as'tru-sfēr"), [key] — n. Biol. the central portion of an aster, in which the centrosome lies. the whole aster exclusive of the centrosome. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. astrophysics Astroturf TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: foison Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language