libration

名词 n.
中文释义
英 /laɪˈbɹeɪ.ʃən/    美 /laɪˈbɹeɪ.ʃən/

英文释义

名词 n.
  1. The act of librating. countable,uncountable
  2. 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. countable,uncountable
  3. A similar rotational or orbital characteristic of some other celestial body. broadly,countable,uncountable
  4. The oscillation of an angle about a stable equilibrium point. countable,uncountable
  5. A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion. countable,uncountable
  6. A wavering between two opposing thoughts or choices. countable,figuratively,uncountable
    — We may not quarrel with attempts to picture the libration of emotion which sways Clytaemestra as she veers from love for her husband to the desire to take vengeance upon him[…]

词形变化

librations plural

词汇关系

衍生词
antilibration librational libration point
相关词
librate libratory nutation

词源

From Latin lībrātiō (“a hurling, swinging”), from lībrō (“poise, cause to swing”).
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