menthene
/ˈmɛnθiːn/Chemistry
noun
Any of a number of isomeric monounsaturated cyclic liquid hydrocarbons, C10H18, formally derived from menthane (terpane) by the loss of two hydrogen atoms.
Origin
Mid 19th century; earliest use found in Robert Thomson (1810–1864), medical officer of health. From French menthène from menthe mint (from classical Latin mentha) + -ène.