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Meaning of hemichordate

hem•i•chor•date

Pronunciation: (hem"i-kôr'dāt), [key]
— Zool. Zool.
—adj.
  1. belonging or pertaining to the chordates of the phylum Hemichordata, comprising small, widely distributed, marine animals, as the acorn worms.
—n.
  1. a hemichordate animal, having a vertebratelike hollow nerve cord and an echinodermlike larval stage.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.