Source : Webster's Revised Unabridged Dictionary (1913)

Pentine \Pen"tine\, n. [See {Penta-}.] (Chem.)
   An unsaturated hydrocarbon, {C5H8}, of the acetylene series.
   Same as {Valerylene}.

Valerylene \Val`er*yl*ene\, n. (Chem.)
   A liquid hydrocarbon, {C5H8}; -- called also {pentine}.