libration
English edit
Etymology edit
From Latin lībrātiō (“a hurling, swinging”), from lībrō (“poise, cause to swing”).
Pronunciation edit
Noun edit
libration (countable and uncountable, plural librations)
- The act of librating.
- (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.
- (by extension) A similar rotational or orbital characteristic of some other celestial body.
- (dynamics) The oscillation of an angle about a stable equilibrium point.[1]
- (chemistry) A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion.
Derived terms edit
Related terms edit
Translations edit
act of libration
astronomy: apparent wobble of the moon
astronomy: similar characteristic of another celesial object
See also edit
References edit
French edit
Pronunciation edit
Audio (file)
Noun edit
libration f (plural librations)
Derived terms edit
Further reading edit
- “libration”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.