Defn: An under-garment worn by the ancient Romans of both sexes. It was made with or without sleeves, reached to or below the knees, and was confined at the waist by a girdle.
2. Any similar garment worm by ancient or Oriental peoples; also, a common name for various styles of loose-fitting under-garments and over-garments worn in modern times by Europeans and others.
3. (R. C. Ch.)
Defn: Same as Tunicle.
4. (Anat.)
Defn: A membrane, or layer of tissue, especially when enveloping an organ or part, as the eye.
5. (Bot.)
Defn: A natural covering; an integument; as, the tunic of a seed.
6. (Zoöl.)
Defn: See Mantle, n., 3 (a).