American pennyroyal
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Noun | 1. | American pennyroyal - 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 - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests genus Hedeoma, Hedeoma - small genus of American herbs (American pennyroyal) hedeoma oil, pennyroyal oil - aromatic oil from American pennyroyal |
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