pennyroyal oil

noun

Medical Definition of pennyroyal oil

: a yellowish aromatic essential oil obtained from an American pennyroyal (Hedeoma pulegioides) and used as an insect repellent and in folk medicine as an emmenagogue, carminative, and stimulant

called also hedeoma oil

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Cite this Entry

“Pennyroyal oil.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pennyroyal%20oil. Accessed 26 Sep. 2020.

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