/ Dictionary / Index C cleoid: Meaning and Definition of Find definitions for: cle•oid Pronunciation: (klē'oid), [key] — n. Dentistry. a claw-shaped dental instrument used to remove carious material from a cavity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cleobulus cleome Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language