天平动

天平動
tiānpíngdòng
(astronomy) libration

CEDICT

astronomy

Entry Composition

1 天平 tiānpíng scales (to weigh things)
2 动 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 动词 dòngcí, verb