/ Dictionary / Index M menthene: Meaning and Definition of Find definitions for: men•thene Pronunciation: (men'thēn), [key] — n. Chem. any of several isomeric, monocyclic terpenes having the formula CH. a colorless, liquid terpene, CH, found in certain essential oils and prepared from menthol. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. menthaceous menthol Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language