/ Dictionary / Index U urochord: Meaning and Definition of Find definitions for: u•ro•chord Pronunciation: (yoor'u-kôrd"), [key] — n. Zool. the notochord of an ascidian or tunicate, more conspicuous in the larva than in the adult and confined chiefly to the caudal region. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: urochord (Thesaurus) uro- urochordate Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language