Pronunciation: - ' pir- ə -fäs, - ' p ī -r ə
Function: noun
Etymology: chlor- + pyri dine + -fos (alter. of phos phorus)
Date: 1970
: a toxic crystalline organophosphate pesticide C 9 H 11 Cl 3 NO 3 PS that inhibits acetylcholinesterase and is used to control insect pests and ticks