paradichlorobenzene
noun
para·di·chlo·ro·ben·zene ˌper-ə-ˌdī-ˌklȯr-ə-ˈben-ˌzēn 
-ˌben-ˈzēn,
ˌpa-rə-
: a white crystalline compound C6H4Cl2 made by chlorinating benzene and used especially as a moth repellent and deodorizer
Example Sentences
Recent Examples on the Web Your grandma's favorite method is on the outs now that many experts consider the chemicals — naphthalene or paradichlorobenzene — a health risk. 
Caroline Picard, Good Housekeeping, 13 Mar. 2019
Caroline Picard, Good Housekeeping, 13 Mar. 2019 Word History
Etymology
International Scientific Vocabulary
First Known Use
1876, in the meaning defined above
Medical Definition
paradichlorobenzene
noun
para·di·chlo·ro·ben·zene
variants also p-dichlorobenzene
ˌpar-ə-ˌdī-ˌklōr-ə-ˈben-ˌzēn, -ˌklȯr-, -ˌben-ˈ
: a white crystalline compound C6H4Cl2 made by chlorinating benzene and used chiefly as a moth repellent and deodorizer
called also PDB