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[tok-sis-i-tee] /tɒkˈsɪs ɪ ti/
noun, plural toxicities.
the quality, relative degree, or specific degree of being toxic or poisonous:
to determine the toxicity of arsenic.
1880-85; toxic + -ity
Related forms
hypertoxicity, noun
nontoxicity, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for toxicity
  • Control pests and diseases with nonchemical methods or low-toxicity chemicals and by choosing varieties that resist disease.
  • Because light also turns potatoes green, a green hue is a pretty good indication of toxicity.
  • No matter the toxicity of the work environment, suicide is a permanent solution to a temporary problem.
  • Much of the building will feature recycled and low-toxicity materials.
  • The evolution of toxicity and the evolution of anti-toxin strategies is considered an arms race between the eaten and the eaters.
  • So the toxicity surrounding school reform isn't likely to disappear.
  • Today, monitoring shows lower toxicity than many had feared, but the levels are still dangerous.
  • Eating all this toxicity and working off the calories, it was a recipe for disaster.
  • Experiments intended to investigate this toxicity using mice have proved unsatisfactory.
  • Even then, because animals are imperfect models, toxicity may only become apparent in human trials.
British Dictionary definitions for toxicity


the degree of strength of a poison
the state or quality of being poisonous
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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Word Origin and History for toxicity

1881, from toxic + -ity.

Online Etymology Dictionary, © 2010 Douglas Harper
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toxicity in Medicine

toxicity tox·ic·i·ty (tŏk-sĭs'ĭ-tē)

  1. The quality or condition of being toxic.

  2. The degree to which a substance is toxic.

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