Any of the primitivefishlikecreatures, of the subphylum Cephalochordata, including the lancelets, that lack a true spine but have a notochord which, in the case of cephalochordates, reaches into the head, contrary to the Urochordata
Adjective
Of or pertaining to these creatures.
Origin
From New Latin Cephalochordata, cephalo- + chordate.
Modern English dictionary
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