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HETP

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Chemistry.
  1. hexaethyl tetraphosphate.
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hexaethyl tetraphosphate

[hek-suh-eth-uh l]
noun
  1. a yellow, very poisonous liquid, (C2H5O)6P4O7, soluble in water, used as an insecticide.
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Origin of hexaethyl tetraphosphate

First recorded in 1945–50; hexa- + ethyl
Also called HETP
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018