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2 definitions found
From: Webster's Revised Unabridged Dictionary (1913)
 Ar·chi·an·nel·i·da n. pl.  Zool. A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions.
 
From: WordNet (r) 2.0
 Archiannelida
      n : a class of Annelida [syn: class Archiannelida]