Definition of paradichlorobenzene in US English:

paradichlorobenzene

(also paradichlorbenzene)

noun

  • A volatile crystalline compound, C₆H₄Cl₂, which has a penetrating odour and is used as a deodorizer and insecticidal fumigant, especially in mothballs.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society.