/ Dictionary / Index A adenoidal: Meaning and Definition of Find definitions for: ad•e•noi•dal Pronunciation: (ad"n-oid'l), [key] — adj. of or pertaining to the adenoids; adenoid. having the adenoids enlarged, esp. to a degree that interferes with normal breathing. being characteristically pinched and nasal in tone quality: a high-pitched, adenoidal voice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adenoidal (Thesaurus) adenoid adenoidectomy Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language