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Meaning of poisonous

poi•son•ous

Pronunciation: (poi'zu-nus), [key]
— adj.
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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