[f. cymo- deriv. of CYMENE + -GENE, as in F. oxygène, etc.] ‘A gaseous substance, consisting chiefly of butane, given off during the distillation of crude paraffin, used condensed by pressure for the production of extreme cold by evaporation’ (Syd. Soc. Lex., 1882).
1886. G. R. Gibson, in Harper’s Mag., Jan., 248/1. The next product [of petroleum] is known as ‘cymogene.’
