[{"word":"retrorocket","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A small rocket engine on a larger rocket or spacecraft, designed to slow or reverse its motion.","synonyms":[],"antonyms":[]}],"synonyms":["retro"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/retrorocket"]}]