桐油

tóngyóu
tung oil, from the Japanese wood-oil tree Aleurites cordata, used in making lacquer

CEDICT

tung oil

Wiktionary

油桐子所製成的油。用途很广，可以涂饰房屋和器具，製造油漆、油墨、油布，并可用作防水、防腐剂等。

重編國語辭典

油桐的种子榨出的油。

維基詞典

Entry Composition

1 桐 tóng tree name (variously Paulownia, Firmiana or Aleurites)
2 油 yóu
  1. oil
  2. fat
  3. grease
  4. petroleum
  5. to apply tung oil, paint or varnish
  6. oily
  7. greasy
  8. glib
  9. cunning