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oligochaete

[ol-i-goh-keet]
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noun
  1. any of various annelids of the family Oligochaeta, including earthworms and certain small, freshwater species, having locomotory setae sunk directly in the body wall.
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Origin of oligochaete

1875–80; < New Latin Oligochaeta; see oligo-, chaeta
Related formsol·i·go·chae·tous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for oligochaete

oligochaete

noun
  1. any freshwater or terrestrial annelid worm of the class Oligochaeta, having bristles (chaetae) borne singly along the length of the body: includes the earthworms
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adjective
  1. of, relating to, or belonging to the class Oligochaeta
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Word Origin

C19: from New Latin; see oligo-, chaeta
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

oligochaete in Science

oligochaete

  1. Any of various annelid worms of the class Oligochaeta. Oligochaetes, unlike polychaetes, have relatively few bristles (called setae) along the body, and often have a thickened, ringlike region (called a clitellum) that secretes a substance used for enclosing eggs in a cocoon. Oligochaetes include the earthworms and a few small freshwater forms. Compare polychaete.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.