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[par-uh-si-tahyz, -sahy-] /ˈpær ə sɪˌtaɪz, -saɪ-/
verb (used with object), parasitized, parasitizing.
to live on (a host) as a parasite.
Origin of parasitize
1885-90; parasite + -ize
Related forms
unparasitized, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for parasitize
  • They used to be thought of solely as foreign intruders--strangers to the cells they invade and parasitize.
  • Brown-headed cowbirds parasitize open-cup nests of birds.
  • Since cowbirds rarely parasitize late season nests, this improves their possibility of raising a successful brood.
  • These new nematodes mate, after which the males die and the females begin searching for more fly hosts to parasitize.
  • The glochidia attach to the fish and parasitize it for a short time, until they are ready to drop-off and begin life on their own.
  • It will grow on a tree of any size and has been known to parasitize one-year-old seedlings.
  • Determining whether the biological control agent will parasitize related weevil species through non-target testing.
British Dictionary definitions for parasitize


/ˈpærəsɪˌtaɪz; -saɪ-/
verb (transitive)
to infest or infect with parasites
to live on (another organism) as a parasite
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
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parasitize in Medicine

parasitize par·a·sit·ize (pār'ə-sĭ-tīz', -sī-)
v. par·a·sit·ized, par·a·sit·iz·ing, par·a·sit·iz·es
To live on or in a host as a parasite.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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