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 (păr′ə-sĭ-toid′, -sī′toid)
An organism, usually an insect, that lives on or in a host organism during some period of its development and eventually kills its host.

par′a·sit·oid′ adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Zoology) zoology an animal, esp an insect, that is parasitic during the larval stage of its life cycle but becomes free-living when adult
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpær ə sɪˌtɔɪd, -saɪ-)

1. an insect that hatches within a host, feeds on it during the larval stage, and becomes free-living when the host dies.
2. any organism whose mode of life is intermediate between a parasite and a predator.
3. of or pertaining to a parasitoid.
[1920–25; < New Latin Parasitoïdea (1913); see parasite, -oid]
par′a•sit•oid•ism, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The influence of parasitoidism on the anatomical and histochemical profiles of the host leaves in a galling Lepidoptcra ungulata system.
2013), thus suggesting that this interaction can be regarded as predation or parasitoidism rather than commensalism or parasitism (Gasca et al.
Parasitism and parasitoidism in Tarsonemina (Acari: Heterostigmata) and evolutionary considerations.
However, it is necessary to develop a rigorous experimental study to test this assumption, since in some centrolenids that display parental care, predation and parasitoidism also occur in some degree (see VILLA, 1977; HAYES, 1991; VOCKENHUBER et al., 2008).
First detailed report of brood parasitoidism in the invasive population of the paper wasp Polistes dominulus (Hymenoptera, Vespidae) in North America.
First record of Archytas marmoratus and Voria ruralis (Diptera: Tachinidae) and levels of parasitoidism in two Lepidoptera pest in Coahuila, Mexico.
However, as pointed out by Van Driesche (1983), these percentages of parasitoidism were obtained from fruit sampled in the field and are usually underestimated.