[{"word":"siltstone","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.","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/siltstone"]}]