Also found in: Medical, Encyclopedia, Wikipedia.


 (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 ?
Highly specific preferences for host stages that are correlated with fitness benefits might explain the coexistence of multiple parasitoid species that use a single host species.
Discovered in the western Amazonia, the parasitoid wasp likes to look for spiders in their nests.
However, the efficiency of this parasitoid is variable according to the locality and the plants on which P.
Native cynipid parasitoids are able to rapidly adapt to new exotic hosts; as a result host shift events may occur and even changing in parasitoid behaviour [8] showed how galls of invading cynipid species in Britain have become the main hosts of local parasitoid populations.
However, strategies of biological control have been reported in Brazil as promising options for control of the cotton bollworm, such as: strains of virus HzSNPV (Ardisson-Araujo, Sosa-Gomez, Melo, Bao, & Ribeiro, 2015), Cry toxins and entomopathogenic fungi (Metarhizium anisopliae, Metarhizium rileyi and Nomuraea rileyi) (Costa et al., 2015; Vivan, Torres, & Fernandes, 2017), larval parasitoid (Guerra, Guerra, Ribas, Goncalves, & Mastrangelo, 2014), and egg parasitoid (Carvalho et al., 2017; Zuim, Rodrigues, Pratissoli, & Torres, 2017).
Abstract: The present study was carried out to determine the searching ability of pupal parasitoid, Dirhinus giffardii of Bactrocera zonata in the Bio Control Research Laboratory, Department of Entomology, SAU, Tandojam, at temperature 27 1C and 60 5% relative humidity.
The cumulative curve of emergences of this embryonic parasitoid on a population of 58 eggs mass is represented by the figure 1.
perminutus is well recognized as a significant parasitoid of pseudococddeos linked with the most diverse cultures, currently prevalent across the world in biological control programs.
longicaudata under field conditions in southern Brazil, helped to motivate the present study aimed at evaluating the effect of releases of this parasitoid into populations of fruit flies and native parasitoids in loquat, peach, strawberry guava and persimmon trees in the city of Eldorado do Sul, RS, Brazil.