libration (English, noun)
expansion: libration (countable and uncountable, plural librations)
Senses:
glosses: The act of librating.
tags: countable
uncountable
topics: astronomy
natural-sciences
glosses: 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.
tags: countable
uncountable
glosses: A similar rotational or orbital characteristic of some other celestial body.
tags: broadly
countable
uncountable
qualifier: dynamics
glosses: The oscillation of an angle about a stable equilibrium point.
tags: countable
uncountable
topics: chemistry
natural-sciences
physical-sciences
glosses: A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion.
tags: countable
uncountable
Forms:
form: librations
tags: plural