adaptogen Syllabification: (a·dapt·o·gen)Pronunciation: /əˈdaptəjən/Definition of adaptogen noun (in herbal medicine) a natural substance considered to help the body adapt to stress and to exert a normalizing effect upon bodily processes. A well-known example is ginseng. Derivatives adaptogenicPronunciation: /əˌdaptəˈjenik/ adjective Origin: 1960s: a term used by N. V. Lazarev, Russian scientist, from adapt + -genadaptogen in other Oxford dictionaries Definition of adaptogen in the British & World English dictionary