Letters that make ethylene
e, l, n, h, t, y are letters that make 'ethylene'
methylene is a word created by adding a letter to 'ethylene'
1 possible definitions for 'ethylene'
Under this definition, ethylene is a noun and has the following properties:
ethene has the same meaning as ethylene
trichloroethylene, trichloroethane, TCE are types of 'ethylene'.