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tetraethyl pyrophosphate

American  

noun

Chemistry.

  1. a colorless to amber, hygroscopic, poisonous liquid, (C 2 H5 ) 4 P 2 O 7 , used as an insecticide and as a rodenticide.

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Residues of hexaethyl tetraphosphate and tetraethyl pyrophosphate persist for only a short time and residues of parathion drop to a low level within 10 to 14 days after application.

From Project Gutenberg

Several organic phosphorus compounds, including hexaethyl tetraphosphate, tetraethyl pyrophosphate, and parathion, have also been developed.

From Project Gutenberg

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.