n.
Pronunciation: ( ˌ )p ə r- ' me-thr ə n
Function: noun
Etymology: per- + meth yl + pyreth rin
Date: 1976
: a synthetic pyrethroid C 21 H 20 Cl 2 O 3 used especially as an insecticide
n.
Pronunciation: ( ˌ )p ə r- ' me-thr ə n
Function: noun
Etymology: per- + meth yl + pyreth rin
Date: 1976
: a synthetic pyrethroid C 21 H 20 Cl 2 O 3 used especially as an insecticide
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012