[{"word":"planetesimal","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"adjective","definitions":[{"definition":"Being or relating to one of these astronomical objects.","synonyms":[],"antonyms":[],"example":"a planetesimal body"}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/planetesimal"]}]