Alstonia n 1: genus of evergreen trees or shrubs with white funnel-shaped flowers and milky sap; tropical Africa to southeastern Asia and Polynesia [syn: {Alstonia}, {genus Alstonia}]
Alstonia \Alstonia\ n. 1. 1 genus of evergreen trees or shrubs with white funnel-shaped flowers and milky sap; tropical Africa to southeast Asia and Polynesia. Syn: genus {Alstonia}. [WordNet 1.5]