- a strongly scented, perennial European mint (Mentha pulegium) with bluish-lavender flowers
- a similar North American mint (Hedeoma pulegioides) that yields an aromatic oil
Origin of pennyroyalaltered ; from earlier pulyol ryal ; from Anglo-French puliol real ; from Old French poliol, pouliol (; from Classical Latin puleium: influenced, influence by associated, association with pulegium, fleabane ; from uncertain or unknown; perhaps ) + real, royal
- A Eurasian mint (Mentha pulegium) having small lilac-blue flowers and ovate or nearly orbicular leaves that yield an essential oil formerly used medicinally and as an insect repellent.
- An aromatic eastern North American mint (Hedeoma pulegioides) having purple-blue flowers and lanceolate to ovate leaves that yield a similar essential oil.
Origin of pennyroyalProbably by folk etymology from Middle English puliol real, from Anglo-Norman : puliol, thyme (from Latin p&umacron;legium) + real, royal (from Latin r&emacron;galis; see regal).