/ Dictionary / Index C carcinoid: Meaning and Definition of Find definitions for: car•ci•noid Pronunciation: (kär'su-noid"), [key] — n. Pathol. a small, yellowish amino-acid and peptide-secreting tumor usually found in the gastrointestinal tract and lung. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: carcinoid (Thesaurus) carcinogenesis carcinoid syndrome 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