The Collaborative International Dictionary
Peppermint \Pep"per*mint\, n. [Pepper + mint.]
(Bot.) An aromatic and pungent plant of the genus Mentha ( Mentha piperita), much used in medicine and confectionery.
A volatile oil (oil of peppermint) distilled from the fresh herb; also, a well-known essence or spirit (essence of peppermint) obtained from it.
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A lozenge of sugar flavored with peppermint.
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.
Wiktionary
n. 1 (cx chiefly AU English) Any of several species of eucalypt which yield an essential oil that smells of peppermint, especially a member of the stringybark group. 2 (cx chiefly AU English) A tree of the family Myrtaceae bearing leaves that smell of peppermint, especially (vern: willow myrtle), (taxlink Agonis flexuosa species noshow=1).