pennyroyal

n 1: Eurasian perennial mint have small lilac-blue flowers and

ovate leaves; yields an aromatic oil [syn: {Mentha

pulegium}]

2: erect hairy branching American herb having purple-blue

flowers; yields an essential oil used as an insect

repellent and sometimes in folk medicine [syn: {American

pennyroyal}, {Hedeoma pulegioides}]