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LIBRATION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
(astronomy) a real or apparent slow oscillation of a moon or satellite
Example:
the libration of the moon
Classified under:
Nouns denoting natural processes
Hypernyms ("libration" is a kind of...):
variation ((astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon))
oscillation (the process of oscillating between states)
Domain category:
astronomy; uranology (the branch of physics that studies celestial bodies and the universe as a whole)
Derivation:
librate (vibrate before coming to a total rest)
