Peppermint \Pep"per*mint\, n. [Pepper + mint.] 1. (Bot.) An aromatic and pungent plant of the genus {Mentha} ({Mentha piperita}), much used in medicine and confectionery. [1913 Webster] 2. A volatile oil (oil of peppermint) distilled from the fresh herb; also, a well-known essence or spirit (essence of peppermint) obtained from it. [1913 Webster] 3. A lozenge of sugar flavored with peppermint. [1913 Webster] {Peppermint} camphor. (Chem.) Same as {Menthol}. {Peppermint tree} (Bot.), a name given to several Australian species of gum tree ({Eucalyptus amygdalina}, {Eucalyptus piperita}, {E. odorata}, etc.) which have hard and durable wood, and yield an essential oil. [1913 Webster]