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libration noun

  /laɪˈbɹeɪ.ʃən/
  • The act of librating.
 качание
  • (astronomy) The apparent wobble or variation in the visible side of the Moon that permanently faces the Earth, allowing observers on Earth to see, over a period of time, slightly more than half of the lunar surface.
 либра́ция

librate verb

  • (intransitive) To be poised; to balance oneself.
 парить
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