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eucalyptus oil[‚yü·kə′lip·təs ‚ȯil]
a natural essential oil obtained from the leaves and young shoots of various eucalypts by distilling with steam. The most important eucalyptus oil is obtained from the Tasmanian blue gum (Eucalyptus globulus Labill); its primary component is cineole. A colorless or light yellow liquid, it has a cooling taste and a camphoraceous-ethereal odor. The density at 15°C is 0.905–0.922 g/cm3. The oil is used in medicine.
Another oil is obtained from Eucalyptus dives, which contains piperitone, the source of thymol and menthol. The oil derived from Eucalyptus citric dora Hook is a component of fragrances for bath soap and a source of citronellal.