润滑油

潤滑油
rùnhuáyóu
lubricating oil

CEDICT

lubricating oil; grease

Wiktionary

使机械润滑，运转灵活的油料。

重編國語辭典

Entry Composition

1 润滑 rùnhuá
  1. smooth
  2. oily
  3. sleek
  4. to lubricate
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