/ Dictionary / Index C CCK: Meaning and Definition of Find definitions for: CCK Pronunciation: [key] cholecystokinin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. C.C.I.A. C-clamp Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language