/par'euh duy klawr'euh ben"zeen, -ben zeen", -klohr'-/ , n. Chem.
a white, crystalline, volatile, water-insoluble solid, C 6 H 4 Cl 2 , of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
Also, paradichlorobenzene . Also called PDB, para . Cf. dichlorobenzene .
[ 1875-80; PARA- 1 + DI- 1 + CHLORO- 2 + BENZENE ]