TONKA BEAN Meaning of TONKA BEAN in English [ 'tɒŋkə ]■ noun the black fragrant seed of a South American tree ( Dipteryx odorata ), used in perfumery and as flavouring.OriginC18: tonka , a local word in Guyana. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004