archiannelida

Archiannelida

Ar`chi*an*nel"i*da\, n. pl. [NL.; pref. archi- + annelida.] (Zo["o]l.) A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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