dichlorophenoxyacetic acid

[ dahy-klawr-oh-fi-nok-see-uh-see-tik, -uh-set-ik, dahy-klohr-, dahy-klawr-oh-fi-nok-, dahy-klohr- ]
/ daɪˈklɔr oʊ fɪˈnɒk si əˈsi tɪk, -əˈsɛt ɪk, daɪˈkloʊr-, daɪˌklɔr oʊ fɪˌnɒk-, daɪˌkloʊr- /

noun Chemistry.

a white to yellow, crystalline powder, C8H6O3Cl2, slightly soluble in water: used for killing weeds.
Also called 2,4-D.

Origin of dichlorophenoxyacetic acid