eu·ca·lyp·tol 
(y′kə-lĭptôl′, -tōl′, -tŏl′) also eu·ca·lyp·tole (-tōl′)
(y′kə-lĭptôl′, -tōl′, -tŏl′) also eu·ca·lyp·tole (-tōl′)n.
A colorless oily liquid, C10H18O, derived from eucalyptus and used in pharmaceuticals, flavoring, and perfumery. Also called cineole.