/ Dictionary / Index A adenocarcinoma: Meaning and Definition of Find definitions for: ad•e•no•car•ci•no•ma Pronunciation: (ad"n-ō-kär"su-nō'mu), [key] — pl. -mas, -ma•ta a malignant tumor arising from secretory epithelium. a malignant tumor of glandlike structure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adenocarcinoma (Thesaurus) adeno- adenohypophysis Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language