D defs.my
Entry 1 sense Webster, 1913

Terpene

· Ter·pene · IPA /ˈtɜː(ɹ)piːn/
01 n. Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of…
  1. 1.
    Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.(Chem.)