ethnobotanyPronunciation: /ˌɛθnəʊˈbɒt(ə)ni/Definition of ethnobotany noun [mass noun] the scientific study of the traditional knowledge and customs of a people concerning plants and their medical, religious, and other uses. Derivatives ethnobotanic adjective ethnobotanical adjective ethnobotanist noun ethnobotany in other Oxford dictionaries Definition of ethnobotany in the US English dictionary