full of or containing poison: poisonous air; a poisonous substance.
harmful; destructive: poisonous to animals; poisonous rumors.
deeply malicious; malevolent: poisonous efforts.
Origin of poisonous
Related formspoi·son·ous·ly, adverbpoi·son·ous·ness, nounnon·poi·son·ous, adjectivenon·poi·son·ous·ly, adverbnon·poi·son·ous·ness, nounsem·i·poi·son·ous, adjectivesem·i·poi·son·ous·ly, adverbun·poi·son·ous, adjectiveun·poi·son·ous·ly, adverb
First recorded in 1565–75; poison
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for nonpoisonoussecure
Examples from the Web for nonpoisonous
Historical Examples of nonpoisonous
(e) The poisonous portions are not distinguishable from the nonpoisonous, either macroscopically or microscopically.
Her second-stage rockets were also of the nonpoisonous variety, because she fired them at a bare 60,000 feet.
Several species of nonpoisonous snakes were more common but were nowhere really abundant.
British Dictionary definitions for nonpoisonous
not having the effects or qualities of a poison
Derived Formspoisonously, adverbpoisonousness, noun
having the effects or qualities of a poison
capable of killing or inflicting injury; venomous
corruptive or malicious
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for nonpoisonous
1570s, from poison (n.) + -ous. Failed 16c. rivals were poisonsome, poisonful, poisony. Earlier poisoned was used (late 15c.). Related: Poisonously; poisonousness.
Online Etymology Dictionary, © 2010 Douglas Harper
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.