/ Dictionary / Index C cholecystokinin: Meaning and Definition of Find definitions for: cho•le•cys•to•ki•nin Pronunciation: (kō"lu-sis"tu-kī'nin, kol"u-), [key] — n. a hormone secreted by the upper portion of the intestine that stimulates contraction of the gallbladder and increases secretion of pancreatic juice. Abbr.: CCK Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cholecystokinin (Thesaurus) cholecystography cholecystostomy Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language