Tunic

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

Noun	1.	tunic - an enveloping or covering membrane or layer of body tissue Synonyms: adventitia, tunica
	2.	tunic - any of a variety of loose fitting cloaks extending to the hips or knees

adventitia, albuginea, membrane, tissue layer, tunica