libration librate • libratory · · · Info · Definitions · Characters · · libration · · Text Latin · · Script 9 · · Length Definitions · · · (noun) (astronomy) a real or apparent slow oscillation of a moon or satellite. Example: "The libration of the moon." · · Noun Definition 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074