Source : Webster's Revised Unabridged Dictionary (1913)

Decene \De"cene\, n. [L. decem ten.] (Chem.)
   One of the higher hydrocarbons, {C10H20}, of the ethylene
   series.

Diamylene \Di*am"y*lene\, n. [Pref. di- + amylene.] (Chem.)
   A liquid hydrocarbon, {C10H20}, of the ethylene series,
   regarded as a polymeric form of amylene.