Dictionaryu•ro•chordPronunciation: (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.
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