/ Dictionary / Index C centrosphere: Meaning and Definition of Find definitions for: cen•tro•sphere Pronunciation: (sen'tru-sfēr"), [key] — n. the protoplasm around a centrosome; the central portion of an aster, containing the centrosome. the central or interior portion of the earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. centrosome centrosymmetric Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language