tung tree /ˈtʊŋ ˌtɹiː/ noun2 •Any of the genus Vernicia, especially Vernicia fordii (syn. Aleurites fordii), of east Asian trees or shrubs cultivated for their seeds which are a source of tung oil. •A candlenut tree, of either of the two species of the genus Aleurites, which also yield such oil. formstung trees