1. pennyroyal

noun. erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine.


  • herb
  • herbaceous plant
  • Hedeoma pulegioides
  • hedeoma oil
  • pennyroyal oil
  • Hedeoma
  • genus Hedeoma

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2. pennyroyal

noun. Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil.


  • pennyroyal oil
  • mint

Sentences with pennyroyal

1. Adjective
You can use extracted menthol or take it in the form of peppermint, eucalyptus or pennyroyal concoctions.

2. Noun, singular or mass
Always be sure to dilute pennyroyal, as it can be toxic when used at full strength.