pennyroyal

noun

1
: a European perennial mint (Mentha pulegium) with small aromatic leaves
2
: an aromatic North American mint (Hedeoma pulegioides) that has blue or violet flowers borne in axillary tufts and yields an oil used in folk medicine or to drive away mosquitoes

Examples of pennyroyal in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Research shows that eucalyptus, pennyroyal, marjoram and rosemary may be useful to treat head lice. Lindsey Bever, Washington Post, 28 June 2024 For those who rarely search for anything beyond a misplaced set of keys or a cellphone, the life of a botanist might look impossibly poetic: combing through fields of wildflowers or perusing mossy riverbanks in search of elusive plants with names like handsome sedge and rough false pennyroyal. Jenna Russell, New York Times, 11 June 2024 Sadly, pennyroyal is also highly toxic and could have proven deadly to the women taking it. Sara Novak, Discover Magazine, 22 Aug. 2022 Overconsumption of pennyroyal and mugwort, for example, can cause liver failure, according to Ryan Marino, the medical director of toxicology and addiction at the University Hospitals in Cleveland. Rania Soetirto, NBC News, 22 July 2022 Yet pennyroyal contains pulegone, which gets metabolized in the body and forms toxins that can cause liver necrosis, says Josh Trebach, emergency medicine physician and medical toxicologist in Iowa City. Ej Dickson, Rolling Stone, 29 June 2022 Many women turned to herbal remedies such as pennyroyal, which were often effective in terminating pregnancy but could also be toxic. Meredith Blake Staff Writer, Los Angeles Times, 25 Dec. 2020 The findings, published Tuesday in the journal Environmental Entomology, revealed that the most popular plant species among the bees were Oregon checker-mallow and mountain pennyroyal flowers. Kristen Rogers and David G. Allan, CNN, 28 Jan. 2020 Another of Portugal’s cookbook mainstays, Vítor Sobral has opened modestly priced, casual tascas in Lisbon and Brazil that hew closer to traditional flavors yet with lightness and flair, such as Azorean tuna with mango, peppers, and pennyroyal. Anne Farrar, National Geographic, 18 June 2019

Word History

Etymology

probably alteration of Anglo-French puliol real, from puliol pennyroyal (ultimately from Latin puleium) + real royal

First Known Use

1530, in the meaning defined at sense 1

Time Traveler
The first known use of pennyroyal was in 1530

Dictionary Entries Near pennyroyal

Cite this Entry

“Pennyroyal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pennyroyal. Accessed 21 Dec. 2024.

Medical Definition

pennyroyal

noun
pen·​ny·​roy·​al ˌpen-ē-ˈrȯi(-ə)l How to pronounce pennyroyal (audio) ˈpen-i-ˌrīl How to pronounce pennyroyal (audio)
: any of several mints
especially : an aromatic American mint (Hedeoma pulegioides) that yields pennyroyal oil

More from Merriam-Webster on pennyroyal

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!