[klawr-uh-pik-rin, -pahy-krin, klohr-]
noun Chemistry, Military.
a colorless, somewhat oily, water-insoluble, poisonous liquid, CCl 3 NO 2 , that causes lachrymation and headache: used as an insecticide, a fungicide, in organic synthesis, and as a war gas.
Also called nitrochloroform.

1885–90; chloro-2 + picr(ic acid) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chloropicrin or chlorpicrin (ˌklɔːrəʊˈpɪkrɪn, klɔːˈpɪkrɪn)
a colourless insoluble toxic lachrymatory liquid used as a pesticide and a tear gas; nitrotrichloromethane. Formula: CCl3NO2
[C20: from chloro- + picro- + -in]
chlorpicrin or chlorpicrin
[C20: from chloro- + picro- + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica


toxic organic compound used alone or in combination with methyl bromide as a soil fumigant and fungicide. Chloropicrin has a boiling point of 112 C (234 F). Its vapours are irritating to the skin, eyes, and upper respiratory tract, and it has been used in chemical warfare and as a tear gas. Chloropicrin is typically prepared by chlorination of either picric acid or nitromethane.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Current chloropicrin labels are not restrictive to use.
Chloropicrin is used for fumigation, to sterilize soil and seed.
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