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parasitize

American  
[par-uh-si-tahyz, -sahy-] / ˈpær ə sɪˌtaɪz, -saɪ- /
especially British, parasitise

verb (used with object)

parasitized, parasitizing
  1. to live on (a host) as a parasite.


parasitize British  
/ -saɪ-, ˈpærəsɪˌtaɪz /

verb

  1. to infest or infect with parasites

  2. 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

Other Word Forms

Derived Forms

Etymology

Origin of parasitize

First recorded in 1885–90; parasite + -ize

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Until now, Brazil had only one documented case of mites that parasitize spiders, and that species belonged to a completely different family.

From Science Daily • Jan. 28, 2026

To understand orca parasites, she had been trying to study organisms that parasitize salmon, a favorite orca prey that might pass the parasites along to the whales.

From Science Magazine • May 7, 2024

As science journalist Rachel Nuwer writes, as many as 40 to 50 percent of all animal species are parasites, and almost every other species has at least one parasite that has evolved to parasitize it.

From Scientific American • Apr. 19, 2022

The birds sometimes raise their eggs in cooperative groups and sometimes parasitize other species’ nests.

From Nature • Feb. 24, 2019

Two roundworms were found to parasitize the guts of the salamanders; the parasitism looks to be benign.

From Natural History of the Salamander, Aneides hardii by Johnston, Richard F.

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