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Urochord

[yoor-uh-kawrd]

noun Zoology.

the notochord of an ascidian or tunicate, more conspicuous in the larva than in the adult and confined chiefly to the caudal region.

Origin:
1875–80; uro-² + chord¹

Related forms

u·ro·chor·dal, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Urochord is always a great word to know.

So is nematoda. Does it mean:

phylum comprised of annelids

phylum of worms comprised of parasitic and free-living nonparasitic species

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Collins

World English Dictionary

urochord (ˈjʊərəʊˌkɔːd)

—n
1.	the notochord of a larval tunicate, typically confined to the tail region

—n, —*adj*
2.	Another word for tunicate Also: urochordate

[C19: from uro-² + chord, a variant of cord]

uro'chordal

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Urochord

u·ro·chord