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poisonous

[poi-zuh-nuh s] /ˈpɔɪ zə nəs/
adjective
1.
full of or containing poison:
poisonous air; a poisonous substance.
2.
harmful; destructive:
poisonous to animals; poisonous rumors.
3.
deeply malicious; malevolent:
poisonous efforts.
Origin
1565-1575
1565-75; poison + -ous
Related forms
poisonously, adverb
poisonousness, noun
nonpoisonous, adjective
nonpoisonously, adverb
nonpoisonousness, noun
semipoisonous, adjective
semipoisonously, adverb
unpoisonous, adjective
unpoisonously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for poisonous
  • If treatment is obtained soon enough, only a small percentage of those bitten by a poisonous snake die.
  • One of the poisonous aspects of being on the academic job market is feeling that one can't or shouldn't talk to people about it.
  • In the current climate, however, such provisions look more poisonous than ever.
  • Some species, including the popular flathead catfish, aren't poisonous at all.
  • Snake loads up on noxious predator repellant by consuming poisonous toads.
  • Arizonans get into more trouble with poisonous creatures than do the residents of any other state.
  • All parts of plant, especially bulbs, are poisonous if ingested.
  • Some sea snails produce poisonous darts to hunt small fish and defend themselves.
  • The fins of these prickly fish carry poisonous venom.
  • Scientists have discovered a long-armed octopus that mimics poisonous creatures of the sea to avoid its predators.
British Dictionary definitions for poisonous

poisonous

/ˈpɔɪzənəs/
adjective
1.
having the effects or qualities of a poison
2.
capable of killing or inflicting injury; venomous
3.
corruptive or malicious
Derived Forms
poisonously, adverb
poisonousness, noun
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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poisonous in Medicine

poisonous poi·son·ous (poi'zə-nəs)
adj.
Relating to or caused by a poison.

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