/ Dictionary / Index A asco-: Meaning and Definition of Find definitions for: asco- Pronunciation: [key] a combining form meaning “sac,” used in the formation of compound words: ascomycete. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Asclepius ascocarp Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language