[{"word":"librations","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The act of librating.","synonyms":[],"antonyms":[]},{"definition":"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.","synonyms":[],"antonyms":[]},{"definition":"(by extension) A similar rotational or orbital characteristic of some other celestial body.","synonyms":[],"antonyms":[]},{"definition":"A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/libration","https://en.wiktionary.org/wiki/librations"]}]