TU'NIC, n. [L. tunica. See Town and Tun.]
1. A kind of waistcoat or under garment worn by men in ancient Rome and the east. In the later ages of the republic, the tunic was a long garment with sleeves.
2. Among the religious, a woolen shirt or under garment.
3. In anatomy, 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.
4. A natural covering; an integument; as the tunic of a See d.
The tunic of the See d, is the arillus, a covering attached to the base only of the See d, near the hilum or scar, and enveloping the rest of the See d more or less completely and closely.
