[{"word":"breechblock","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The metal block that closes the breech of a breech-loading gun after insertion of the cartridge.","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/breechblock"]}]