olefin

English Thesaurus

1. any unsaturated aliphatic hydrocarbon (noun.substance)

hypernym	:	aliphatic compound,
definition	:	organic compound that is an alkane or alkene or alkyne or their derivative (noun.substance)

hyponym	:	ethene, ethylene,
definition	:	a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic (noun.substance)