[{"word":"opisthobranch","phonetic":"/ɵˈpɪsθəbɹæŋk/","phonetics":[{"text":"/ɵˈpɪsθəbɹæŋk/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A gastropod with gills behind the heart, formerly thought to belong to a single group.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"adjective","definitions":[{"definition":"(of gills) Placed behind the heart.","synonyms":[],"antonyms":["prosobranch"]},{"definition":"(of a gastropod) Having gills placed behind the heart.","synonyms":[],"antonyms":["prosobranch"]}],"synonyms":[],"antonyms":["prosobranch","prosobranch"]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/opisthobranch"]}]