Noun pennyroyal has 2 senses
  1. pennyroyal, Mentha pulegium - Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil
    --1 is a kind of mint
    --1 has substances: pennyroyal oil
  2. pennyroyal, American pennyroyal, Hedeoma pulegioides - erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine
    --2 is a kind of herb, herbaceous plant
    --2 is a member of Hedeoma, genus Hedeoma
    --2 has substances: pennyroyal oil, hedeoma oil
,
TOP