天平動

天平动
tiānpíngdòng
(astronomy) libration

CEDICT

astronomy

Entry Composition

1 天平 tiānpíng scales (to weigh things)
2 動 dòng
  1. (of sth) to move
  2. to set in movement
  3. to displace
  4. to touch
  5. to make use of
  6. to stir (emotions)
  7. to alter
  8. abbr. for 動詞 dòngcí, verb