DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Valylene \Val"yl*ene\, n. [Valerian + -yl.] (Chem.)
      A volatile liquid hydrocarbon, C5H6, related to ethylene
      and acetylene, but possessing the property of unsaturation in
      the third degree. It is the only known member of a distinct
      series of compounds. It has a garlic odor.
      [1913 Webster]