Tū'nic, n.

noun

n. [Fr. tunique, It. tonica, tunica, Pr., Sp., Pg., & Lat. tunica.]

(Antiq.) An under garment worn by both sexes in ancient Rome and the East, reaching to or below the knees.
(Rom. Cath. Church.) A long under-garment worn by the officiating clergy.
(Anat.) A membrane that covers or composes some part or organ; as, the tunics or coats of the eye; the tunics of the stomach, or the membranous and muscular layers which compose it.
(Bot.) A natural covering; an integument; as, the tunic of a seed.