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parathion

[par-uh-thahy-on] /ˌpær əˈθaɪ ɒn/
noun, Chemistry.
1.
a deep-brown to yellow, poisonous liquid, C 1 0 H 1 4 NO 5 PS, used as an insecticide.
Origin of parathion
1945-1950
First recorded in 1945-50; para-1 + thi- + -on(e)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for parathion

parathion

/ˌpærəˈθaɪɒn/
noun
1.
a slightly water-soluble toxic oil, odourless and colourless when pure, used as an insecticide. Formula: C10H14NO5PS
Word Origin
C20: from para-1 + thio- + -on
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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parathion in Medicine

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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