4d's

dichlorophenoxyacetic acid

[dahy-klawr-oh-fi-nok-see-uh-see-tik, -uh-set-ik, dahy-klohr-, dahy-klawr-oh-fi-nok-, dahy-klohr-]
noun Chemistry.
a white to yellow, crystalline powder, C 8 H 6 O 3 Cl 2 , slightly soluble in water: used for killing weeds.
Also called 2, 4-D.


Origin:
di-1 + chloro-2 + phen- + oxy-2 + acetic acid

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