herbal medicinenoun
uk/ˌhɜː.bəl ˈmed.ɪ.sən//ˌɝː.bəl ˈmed.ɪ.sən/[ U ] the use of plants to treat medical conditions:
Preparations used in herbal medicine include poultices, tinctures, oils, balms, and teas.
[ C ] a medicine or medical treatment made from plants:
Some herbal medicines can make you very sick.