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A parasite, such as a flea, that lives on the exterior of another organism.

ec′to·par′a·sit′ic (-sĭt′ĭk) adj.
ec′to·par′a·sit·ism n.
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.


(Biology) a parasite, such as the flea, that lives on the outer surface of its host. Also called: exoparasite
ectoparasitic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɛk toʊˈpær əˌsaɪt)

an external parasite.
ec`to•par`a•sit′ic (-ˈsɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ectoparasite - any external parasitic organism (as fleas)
parasite - an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host
flea - any wingless bloodsucking parasitic insect noted for ability to leap
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
When compared to other demonstrated costs of colonial breeding in swallows, such as elevated rates of ectoparasitism (Brown and Brown, 1986; Moller, 1987a; Shields and Crook, 1987), increased competition for limited resources (Hoogland and Sherman, 1976; Moller, 1987a), and higher rates of intraspecific brood parasitism (Moller, 1987a), it is therefore possible the energetic costs of mislaying eggs are relatively minor.
He said birds had also been dewormed against ectoparasitism.
Aural haematoma often called as boxer's or wrestler's or cauliflower ear occurs due to constant shaking and rubbing of ear due to otitis, hypersensitivity and allergic dermatitis, ectoparasitism, otorrhea and presence of foreign bodies, leads to rupture of inner vessels resulting in bleeding within the cartilage layers of auricle and haematoma formation (Ahiwar et al., 2007).
(2014) Plumage coverage is related to body condition and ectoparasitism in Blue-black Grassquits.
Considering the economic, productive and sanitaries damages for the commercial laying hens industry can be attributed to the ectoparasitism by Megninia spp., the present research has the aims to develop a risk index and to accomplish the epidemiological characterization of the presence of those mites using for that the CA.
Therefore, it will be all the more interesting to follow the long-term evolution of ectoparasitism in the years to come in order to characterize the ectoparasite stand of the pigeon biset in the Algerian Sahel.
The parasitism caused by parasites can be divided into 2 categories as endoparasitism caused by endoparasites likehelminthes and ectoparasitism caused by ectoparasites.
Ectoparasitism and vector-borne diseases in 930 homeless people from Marseilles.
Ectoparasitism in Aulacothrips (Thysanoptera: Heterothripidae) revisited: Host diversity on honeydew-producing Hemiptera and description of a new species.
Indirect effects of ectoparasitism include: transmission of pathogens causing babesiosis, theileriosis, anaplasmosis etc.