trichloroethanePronunciation: /ˌtrʌɪklɔːrəʊˈiːθeɪn, -klɒr-/Definition of trichloroethane noun [mass noun] Chemistry a colourless non-flammable volatile liquid, used as a solvent and cleaner. Alternative name: 1,1,1-trichloroethane; chemical formula: CCl3CH3 trichloroethane in other Oxford dictionaries Definition of trichloroethane in the US English dictionary