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Any of various apicomplexan protozoans that are parasitic within the digestive tract and body cavity of invertebrates, including many insects and mollusks.

[From New Latin Gregārīna, type genus, from Latin gregārius, belonging to a flock; see gregarious.]

greg′a·rine′, greg′a·rin′i·an (-rĭn′ē-ən) 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.


(ˈɡrɛɡəˌriːn; -rɪn)
(Animals) any parasitic protozoan of the order Gregarinida, typically occurring in the digestive tract and body cavity of other invertebrates: phylum Apicomplexa (sporozoans)
(Animals) of, relating to, or belonging to the Gregarinida
[C19: from New Latin Gregarīna genus name, from Latin gregārius; see gregarious]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gregarine - vermiform protozoans parasitic in insects and other invertebratesgregarine - vermiform protozoans parasitic in insects and other invertebrates
sporozoan - parasitic spore-forming protozoan
Gregarinida, order Gregarinida - an order in the subclass Telosporidia
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References in periodicals archive ?
Chen, "Intestinal expression of H+ V-ATPase in the mosquito Aedes albopictus is tightly associated with gregarine infection," Journal of Eukaryotic Microbiology, vol.
Gregarine and coccidian protozoans (Apicomplexa) found leading to hypertrophy of the digestive epithelial cells and nephridal tubules, respectively, were recorded only in the Mar del Plata population, both with a low prevalence and intensity of infection (Table 2).
Escape from gregarine parasites affects the competitive interactions of an invasive mosquito.
Coastal molluscs are host to a variety of parasites, from trematode flatworms to nematodes and gregarine protozoans (Kim and Powell, 2007).
Territorial and mating success of dragonflies that vary in muscle power output and presence of gregarine gut parasites.
albopictus is competent for dengue serotypes 2 and 3 in Mexico (16), its current geographical distribution, relative population of host-seeking females and the possible existence of parasitic gregarine in northeastern Mexico have not been documented.
Patterns of gregarine parasitism in dragonlies: host, habitat, and seasonality.
Previous studies demonstrated an association between the number of B chromosomes and resistance to gregarine infection in natural populations of this species (Gorlov & Tsurusaki 2000).
One popular alternative hypothesis for the pattern of invasion and decline is apparent competition via the gregarine protozoan parasite Ascogregarina taiwanensis (Blackmore et al.
Post-copulatory guarding, female choice and the levels of gregarine infections in the field cricket, Gryllus bimaculatus.