a colourless flammable gaseous unsaturated compound made by the chlorination of ethylene and used as a refrigerant and in the manufacture of PVC; chloroethylene; chloroethene. Formula: CH:CHCl
vinyl chloride in American English
a colorless gas, CH2:CHCl, made by reacting acetylene with hydrogen chloride or by cracking ethylene dichloride: it is used to make polyvinyl chloride, etc.