chlorpyrifos

chlor·pyr·i·fos

[klawr-pir-uh-fos, klohr-]
noun
a broad-spectrum insecticide, C 9 H 11 Cl 3 NO 3 PS, used on lawns and ornamental plants.

Origin:
chlor-2 + pyri(dine) + -fos, for phosphorus

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
chlorpyrifos

noun
a common organophosphate insecticide 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Chlorpyrifos is always a great word to know.
So is quincunx. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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