桐籽 tóngzǐ tung seed Definitions Defs Origin Strokes Stroke Words Sentences Sents 桐 tóng tong tree (bound form) any of several broad-leaved trees including the Chinese parasol tree 梧桐 wútóng, the empress tree 泡桐 pāotóng, and the tung oil tree 油桐 yóutóng籽 zǐ noun seed seed of certain plants such as grain or vegetables