American pennyroyal

/əˌmɛrəkən ˌˈpɛniˌˈrɔɪ(ə)l/
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Definitions of American pennyroyal
  1. noun
    erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine
    synonyms: Hedeoma pulegioides, pennyroyal
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    type of:
    herb, herbaceous plant
    a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
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