li·bra·tion (l -br  sh n)n. A very slow oscillation, real or apparent, of a satellite as viewed from the larger celestial body around which it revolves. [Latin l brtio, lbrti n-, oscillation, from lbrtus, past participle of lbrre, to balance, from lbra, balance.]li·bra tion·al adj.li bra·to ry (-br-tôr , -tr) adj. |
libration [laɪˈbreɪʃən]
n
1. the act or an instance of oscillating
2. (Astronomy) a real or apparent oscillation of the moon enabling approximately 59 per cent of the surface to be visible from the earth over a period of time
librational adj
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | libration - (astronomy) a real or apparent slow oscillation of a moon or satellite; "the libration of the moon" astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole 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 |
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