Protochordates

protochordate

[proh-toh-kawr-deyt]
noun Zoology.
any of the nonvertebrate chordates, as the tunicates, cephalochordates, and hemichordates.

Origin:
1890–95; < Neo-Latin Protochordata name of the group; see proto-, chordate

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World English Dictionary
protochordate (ˌprəʊtəʊˈkɔːdeɪt)
 
n
1.  any chordate animal of the subphyla Hemichordata (acorn worms), Urochordata (tunicates), and Cephalochordata (lancelets)
 
adj
2.  of or relating to protochordates

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