angosturaPronunciation: /ˌaŋgəˈstjʊərə/ (also angostura bark)Definition of angostura noun [mass noun] an aromatic bitter bark from certain South American trees, used as a flavouring, and formerly as a tonic and to reduce fever. The trees are Angostura febrifuga and Galipea officinalis, family Rutaceae short for Angostura bitters.Origin: late 18th century: from the place name Angosturaangostura in other Oxford dictionaries Definition of angostura in the US English dictionary