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parasitoid

[par-uh-si-toid, -sahy-]
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noun
  1. an organism that practices parasitoidism.
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adjective
  1. of or relating to a parasite, especially one practicing parasitoidism.
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Origin of parasitoid

1920–25; < New Latin Parasitoïdea (1913); see parasite, -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for parasitoid

parasitoid

noun
  1. zoology an animal, esp an insect, that is parasitic during the larval stage of its life cycle but becomes free-living when adult
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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

parasitoid in Science

parasitoid

[părə-sĭ-toid′, -sī′toid]
  1. Any of various insects, such as the ichneumon fly, whose larvae are parasites that eventually kill their hosts. The adult parasitoid deposits an egg on or inside the body of its host, typically the larva of another arthropod. When the egg hatches, the parasitoid larva feeds on the host's tissues, gradually killing it.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.