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A potent toxic nerve agent of the organophosphate class.
A toxic nerve gas, O-ethyl-[S]-[2-diisopropylaminoethyl]-methylphosphonothiolate, that might cause severe damage to public health if it were used in an act of biological terrorism.
a nerve gas, the escape of which caused the 'Utah Sheep Kill' in Skull Valley, Utah, USA in 1968.
in medical records, the abbreviation for vaccination.