variation 8
noundomain: natural phenomenon
Princeton WordNet [ver.3.1]
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EnglishDefinition
(astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)
Hypernym
perturbation 2
noun
(physics) a secondary influence on a system that causes it to deviate slightly
Domain_of_synset_-_TOPIC
astronomy 1
noun
the branch of physics that studies celestial bodies and the universe as a whole
EnglishDerivationally related form
Hyponym
libration 1
noun
(astronomy) a real or apparent slow oscillation of a moon or satellite
Member_of_this_domain_-_TOPIC
astronomy 1
noun
the branch of physics that studies celestial bodies and the universe as a whole
