NCIt definition : A synthetic organic thiophosphate compound and organophosphate acetylcholinesterase
inhibitor that is the methyl homolog of parathion and is used as a pesticide. It is
characterized as a colorless to white or tan crystalline solid that is odorless or
has a pungent garlic-like odor, and exposure occurs by inhalation, ingestion, or contact.;
Alternative definition : CDISC: The organophosphorus agent methyl parathion.;