(bound form) a type of deciduous tree known as the idesia, also called 山桐子 shān​tóng​zǐ

(bound form) any of several broad-leaved trees including the Chinese parasol tree 梧桐 wú​tóng, the empress tree 泡桐 pāo​tóng, and the tung oil tree 油桐 yóu​tóng