from the GNU version of the Collaborative International Dictionary of English
- n.pl. A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions.
from The Century Dictionary and Cyclopedia
- A subclass or other leading division of annelids, supposed to be the nearest living representatives of the archetypal segmented worms. The best-known genus is Polygordius (which see).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a class of Annelida
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