sb. pl. Zool. [mod.L., neut. pl. of tunicātus (sc. animālia) coated, TUNICATE.] A division of animals, now regarded as a sub-phylum of the Chordata; also called Urochorda: see next, B.
1828. Stark, Elem. Nat. Hist., II. 115. Class III.—Tunicata. Gelatinous or coriaceous biforous, bitunicated animals, isolated, in groups, or often joined together in a common mass.
1851. Richardson, Geol., viii. (1855), 230. The Tunicata have no shell, and are enclosed in an elastic muscular sac, with two openings.
1855. H. Spencer, Princ. Psychol. (1872), I. I. i. 10. Humble Mollusks, like the fixed Tunicata.
