/ Dictionary / Index T tunicate: Meaning and Definition of Find definitions for: tu•ni•cate Pronunciation: (t'ni-kit, -kāt", ty'-), [key] — n. any sessile marine chordate of the subphylum Tunicata (Urochordata), having a saclike body enclosed in a thick membrane or tunic and two openings or siphons for the ingress and egress of water. —adj. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tunicate (Thesaurus) tunica tunic flower Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language