eleoptene

/ˌɛliˈɒptiːn/
noun
  1. The liquid, volatile part of an essential oil, as opposed to the solid or crystalline part (stearoptene).
    • The eleoptene in lavender oil gives it its characteristic scent.
    • Perfumers often use the eleoptene fraction for lighter fragrances.
    • Distillation separates the eleoptene from the heavier components of the oil.