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[par-uh-sit-ik] /ˌpær əˈsɪt ɪk/
of, relating to, or characteristic of parasites.
(of diseases) due to parasites.
Phonetics, excrescent (def 2).
Origin of parasitic
1620-30; < Latin parasīticus < Greek parasītikós. See parasite, -ic
Related forms
parasitically, adverb
parasiticalness, noun
antiparasitic, noun, adjective
antiparasitical, adjective
antiparasitically, adverb
nonparasitic, adjective
nonparasitical, adjective
nonparasitically, adverb
pseudoparasitic, adjective
unparasitic, adjective
unparasitical, adjective
unparasitically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for parasitical
  • It's parasitical humor, to be sure, and funny as all get out.
  • Focus on good education, good infrastructure and clamp down on parasitical speculation and pork distribution.
  • And for parasitical bloodsuckers, they do remarkably little harm.
  • The bloggers are parasitical on the conventional media.
  • While theoretical values are valuable, in practice considerable additional parasitical losses occur.
  • Vaccinations to prevent infectious, microbiology, viral or parasitical diseases if necessary.
  • Wild turkeys are subject to many infectious and non-infectious diseases and parasitical infections.
  • Many brandies and parasitical plants had been snapped off and were strewn on the ground.
Word Origin and History for parasitical



1620s, from Latin parasiticus, from Greek parasitikos "of or pertaining to a parasite; the trade of a parasite," from parasitos (see parasite). Biological sense is from 1731. Related: Parasitical, 1570s in reference to toadies; from 1640s in the biological sense.

Online Etymology Dictionary, © 2010 Douglas Harper
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parasitical in Medicine

parasitic par·a·sit·ic (pār'ə-sĭt'ĭk) or par·a·sit·i·cal (-ĭ-kəl)

  1. Of, relating to, or characteristic of a parasite.

  2. Caused by 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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