n. [ Tetra- + ethylene. ] (Chem.) Butylene; -- so called from the four carbon atoms in the molecule. [ 1913 Webster ]
n. [ From Ethyl. ] (Chem.) A colorless, gaseous hydrocarbon,
Ethylene series (Chem.),
n. [ From Ethyl. ] (Chem.) A colorless, gaseous hydrocarbon,
Ethylene series (Chem.),