parathion

parathion

[par-uh-thahy-on]
noun Chemistry.
a deep-brown to yellow, poisonous liquid, C 1 0 H 1 4 NO 5 PS, used as an insecticide.

Origin:
1945–50; para-1 + thi- + -on(e)

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Collins
World English Dictionary
parathion (ˌpærəˈθaɪɒn)
 
n
a slightly water-soluble toxic oil, odourless and colourless when pure, used as an insecticide. Formula: C10H14NO5PS
 
[C20: from para-1 + thio- + -on]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

parathion par·a·thi·on (pār'ə-thī'ŏn)
n.
A highly poisonous organic phosphate insecticide that is an irreversible inhibitor of cholinesterase.

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

parathion

an organic phosphorus compound well known as an insecticide that is extremely toxic to humans. The compound acts in mammals, as in insects, as a cholinesterase inhibitor (cholinesterase being the enzyme that controls the normal functioning of the nervous system), causing death by inducing respiratory failure. The specific antidote for poisoning by parathion and other organophosphorus insecticides is atropine. Parathion and similar insecticides must be handled with great care because the substance is toxic if swallowed, inhaled, or absorbed through the skin. Parathion may be rendered nontoxic by application of an alkaline solution.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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