[ton.ka bean] n [prob. fr. Tupi tonka] (1796): the coumarin-containing seed of any of several tropical American leguminous trees (genus Dipteryx) that is used in perfumes and as an artificial vanilla flavoring; also: a tree bearing tonka beans
TONKA BEAN
Meaning of TONKA BEAN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012