A colourless viscous oil with a woody aroma, present in the resins from some species of pine.
Longifolene is a tricyclic sesquiterpene whose derivatives are much used in perfumery. Formula: C₁₅H₂₄.
1920s; earliest use found in John Simonsen (1884–1957), organic chemist. From scientific Latin longifolia, former specific epithet of the tree from which the oil was first isolated, the Himalayan chir pine Pinus longifolia, now P. roxburghii + -ene.