(1):
(n.) A membrane, or layer of tissue, especially when enveloping an organ or part, as the eye.
(2):
(n.) 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):
(n.) 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.
(4):
(n.) A natural covering; an integument; as, the tunic of a seed.
(5):
(n.) Same as Tunicle.
(6):
(n.) See Mantle, n., 3 (a).