Webster’s Revised Unabridged Dictionary · 1913 Prescutum Pre·scu′tum (prē·skū′tŭm), n.; pl. Prescuta. [NL. See Præ-, and Scutum.] (Zoöl.) The first of the four pieces composing the dorsal part, or tergum, of a thoracic segment of an insect. It is usually small and inconspicuous. ‹ Prescriptively Preseance ›