What is "dichlorobenzene"

n. (context organic compound English) Either of three isomeric derivatives of benzene in which two hydrogen atoms have been replaced by chlorine; they are used as solvents and in organic synthesis

There are three distinct chemical compounds which are dichlorobenzenes:

• 1,2-Dichlorobenzene or ortho-dichlorobenzene;
• 1,3-Dichlorobenzene or meta-dichlorobenzene;
• 1,4-Dichlorobenzene or para-dichlorobenzene.