- C6H4CH32
- Orthoxylene Or`tho*xy"lene, n. [Ortho- + xylene.] (Chem.) That variety of xylene ({C6H4(CH3)2}) in which the two methyl groups are in the ortho position; a colorless, liquid, combustible hydrocarbon resembling benzene. [1913 Webster]
The Collaborative International Dictionary of English. 2000.