- Any of three colorless flammable isomeric benzene derivatives, C<sub>8</sub>H<sub>10</sub>, obtained from wood and coal tar.
- A mixture of xylene isomers used as a solvent in making lacquers and rubber cement and as an aviation fuel.
- Any one of the three metameric dimethyl benzines C<sub>6</sub>H<sub>4</sub> (CH<sub>3</sub>)<sub>2</sub>. They are volatile, inflammable liquids obtained from wood-spirit and from coal-tar. Also <em>xylol, xylole.</em>
- Any of a group of three metameric hydrocarbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively <stype>orthoxylene</stype>, <stype>metaxylene</stype>, and <stype>paraxylene</stype>. Called also <altname>xylol</altname>.
- Any of a group of three <xref>isomeric</xref> <xref>aromatic</xref> <xref>hydrocarbons</xref>, di-methyl-benzene, found in <xref>coal</xref> and <xref>wood</xref> <xref>tar</xref>.
- a colorless flammable volatile liquid hydrocarbon used as a solvent