pennyroyal
/ˌpenɪˈrɔɪəl/noun
1- either of two small-leaved plants of the mint family, used in herbal medicine薄荷, 薄荷类植物。
1.1
- A creeping Eurasian plant (Mentha pulegium), and American pennyroyal (Hedeoma pulegioides), family Labiatae.唇萼薄荷（拉丁名Mentha pulegium）和穗花薄荷（拉丁名Hedeoma pulegioides）, 唇形科。
词源
mid 16th cent.: from Anglo-Norman French puliol （based on Latin pulegium 'thyme'）+real 'royal'.