In zoology, coated; covered with tunics or integuments; specifically, enveloped in membranous integuments or tunics, as an ascidian; of or pertaining to the Tunicata; tunicated.In entomology, covered one by another, like a set of thimbles, as the joints of some antennæ.In botany, covered with a tunic or membrane; coated.n. A tunic.n. An ascidian, tunicary, or sea-squirt; any member of the Tunicata.