chloromethane noun2 •Methyl chloride, a flammable gas once used as a refrigerant, with chemical formula CH₃Cl.[…] by subjecting that compound to the action of chlorine in sunshine, whereby chloromethane, or methyl chloride, CH₃Cl, is produced, and distilling this chloride with potash. — 1869 •Any of the chlorinated derivatives of methane. formschloromethanes
