Definition of alachlor
: an herbicide C14H20ClNO2 derived from aniline and used to control grasses and broadleaved weeds among crop plants
Origin and Etymology of alachlor
ala- (perhaps from rearranged letters of acetanilide) + chlor-
First Known Use: 1970
Seen and Heard
What made you want to look up alachlor? Please tell us where you read or heard it (including the quote, if possible).