|  ethylene 
 
 a flammable colorless gaseous alkene;
 obtained from petroleum and natural gas and used in manufacturing many other chemicals;
 sometimes used as an anesthetic
 • Syn:
 ethene
 • Hypernyms:
 alkene, olefine, olefin, gas
 • Hyponyms:
 trichloroethylene, trichloroethane, TCE
 
 
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