dichlorobenzene
noun
di·chlo·ro·ben·zene (ˌ)dī-ˌklȯr-ə-ˈben-ˌzēn 
-(ˌ)ben-ˈzēn
: any of three isomeric compounds C6H4Cl2
especially : paradichlorobenzene
Example Sentences
Recent Examples on the Web The pesticide in most mothballs is para-dichlorobenzene (PDCB). 
Joe, The Seattle Times, 4 Feb. 2018
Joe, The Seattle Times, 4 Feb. 2018 Word History
First Known Use
1873, in the meaning defined above
Medical Definition
dichlorobenzene
noun
di·chlo·ro·ben·zene (ˌ)dī-ˌklōr-ə-ˈben-ˌzēn, -ˌklȯr-, -(ˌ)ben-ˈ
: any of three isomeric benzene derivatives C6H4Cl2 (as paradichlorobenzene) that differ in the relative placements of the two chlorine atoms