a kind of waistcoat or under garment, in use among the Romans. They wore it within doors by itself, and abroad under the gown. The common people could not afford the toga, and so went in their tunics; whence Horace calls them populus tunicatus.

in anatomy, is applied to the membranes which invest the vessels, and divers others of the less solid parts of the body; thus the inteflines are formed of five tunics or coats.