pennyroyal oil is a noun meaning "oil from European pennyroyal having an odor like mint; used chiefly in soaps". It carries 2 recorded senses.
oil from European pennyroyal having an odor like mint; used chiefly in soaps
aromatic oil from American pennyroyal
Definitions, synonyms and semantic relations for pennyroyal oil come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.