oligochaete

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various annelid worms of the class (or subclass) Oligochaeta, including the earthworms and aquatic species found chiefly in freshwater, which lack the appendages typical of polychaetes.

from The Century Dictionary.

• Belonging to or having the characteristics of the Oligochæta.
• noun A worm of the order Oligochæta.

from the GNU version of the Collaborative International Dictionary of English.

• noun Any of an order of hermaphroditic terrestrial and aquatic annelids (including the earthworms) having bristles borne singly along the length of the body; a member of the Oligochaeta.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun any of various hermaphroditic aquatic and terrestrial annelid worms, of the class Oligochaeta, that have single bristles along the body

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body