alachlor

noun

al·​a·​chlor ˈa-lə-ˌklȯr 

: an herbicide C₁₄H₂₀ClNO₂ derived from aniline and used to control grasses and broadleaved weeds among crop plants

Word History

Etymology

ala- (perhaps from rearranged letters of acetanilide) + chlor-

First Known Use

1970, in the meaning defined above