[par-uh-thahy-on] /ˌpær əˈθaɪ ɒn/

noun, Chemistry.
a deep-brown to yellow, poisonous liquid, C 1 0 H 1 4 NO 5 PS, used as an insecticide.
a slightly water-soluble toxic oil, odourless and colourless when pure, used as an insecticide. Formula: C10H14NO5PS

parathion par·a·thi·on (pār’ə-thī’ŏn)
A highly poisonous organic phosphate insecticide that is an irreversible inhibitor of cholinesterase.


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