pennyroyal oil


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pennyroyal oil

[¦pen·ē¦rȯi·əl ‚ȯil]
(materials)
An essential oil distilled from the dried leaves and tops of the small pennyroyal plants Hedeoma pulegioides or Mentha pulegium; used as a counterirritant in liniments, in insect repellents, and for the production of methanol.