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para-dichlorobenzene

or par·a·di·chlo·ro·ben·zene

[par-uh-dahy-klawr-uh-ben-zeen, -ben-zeen, -klohr-]
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noun Chemistry.
  1. a white, crystalline, volatile, water-insoluble solid, C6H4Cl2, of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
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Compare dichlorobenzene.

Origin of para-dichlorobenzene

First recorded in 1875–80; para-1 + di-1 + chloro-2 + benzene
Also called PDB, para.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018