/ Dictionary / Index P prescutum: Meaning and Definition of Find definitions for: pre•scu•tum Pronunciation: (prē-sky'tum), [key] — pl. -ta -tums. the anterior dorsal sclerite of a thoracic segment of an insect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prescriptivist preselect Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language