pennyroyal

 
Pronunciation: /pɛnɪˈrɔɪəl/

noun

  • either of two small-leaved plants of the mint family, used in herbal medicine.
    • A creeping Eurasian plant (Mentha pulegium), and American pennyroyal (Hedeoma pulegioides), family Labiatae

Origin:

mid 16th century: from Anglo-Norman French puliol (based on Latin pulegium 'thyme') + real 'royal'