/ Dictionary / Index C cercus: Meaning and Definition of Find definitions for: cer•cus Pronunciation: (sûr'kus, ker'-), [key] — pl. cer•ci one of a pair of appendages at the rear of the abdomen of certain insects and other arthropods, serving as tactile organs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cercis cere 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