para-dichlorobenzene

para-dichlorobenzene

[par-uh-dahy-klawr-uh-ben-zeen, -ben-zeen, -klohr-]
noun Chemistry.
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.
Compare dichlorobenzene.


Origin:
1875–80; para-1 + di-1 + chloro-2 + benzene

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