Webster's English Dictionary

Enter the word to look up:

ethylene

eth.yl.ene \'eth-*-.le-n\ \.eth-*-'le--nik\ \-ni-k(*-)le-\ n 1: a colorless 
   flammable gaseous unsaturated hydrocarbon CH2=CH2I found in coal gas or 
   obtained by pyrolysis of petroleum hydrocarbons 2: a bivalent hydrocarbon 
   radical -CH2CH2- derived from eth ane - eth.yl.enic aj