trichlorophenoxyacetic acid

[ trahy-klawr-oh-fuh-nok-see-uh-see-tik, -set-ik, -klohr-, -klawr-, -klohr- ]
/ traɪˈklɔr oʊ fəˌnɒk si əˈsi tɪk, -ˈsɛt ɪk, -ˈkloʊr-, -ˌklɔr-, -ˌkloʊr- /

noun Chemistry.

a light-tan, water-insoluble solid, C8H5Cl3O3, used chiefly for killing weeds.
Also called 2,4,5-T.

Origin of trichlorophenoxyacetic acid

British Dictionary definitions for 2,4,5-t

trichlorophenoxyacetic acid
/ (traɪˈklɔːrəʊfəˌnɒksɪəˈsiːtɪk) /

noun

an insoluble crystalline solid; 2,4,5-trichlorophenoxyacetic acid. It is a plant hormone and is used as a weedkiller. Formula: C 8 H 5 Cl 3 O 3 Also called: 2,4,5-T