/ Dictionary / Index N notum: Meaning and Definition of Find definitions for: no•tum Pronunciation: (nō'tum), [key] — pl. -ta a dorsal plate or sclerite of the thorax of an insect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. notturno notungulate Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language