/ Dictionary / Index A ascaris: Meaning and Definition of Find definitions for: as•ca•ris Pronunciation: (as'ku-ris), [key] — pl. as•car•i•des any parasitic roundworm of the genus Ascaris, found in the human small intestine and causing colic and diarrhea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ascaris (Thesaurus) ascaridole ascend Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language