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tet·ra·eth·yl py·ro·phos·phate (TEPP),(tet'ră-eth'il pī'rō-fos'fāt),
An organic phosphoric compound used as an insecticide; a potent irreversible cholinesterase inhibitor.
an insecticide used industrially and in agriculture and not to be used on animals. Accidental administration can cause death within an hour. Called also TEPP.