/ Dictionary / Index C concyclic: Meaning and Definition of Find definitions for: con•cyc•lic Pronunciation: (kun-sī'klik, -sik'lik), [key] — adj. Geom. (of a system of points) lying on the circumference of a circle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. concussion grenade cond. Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language