[{"word":"heartwood","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The wood nearer the heart of a stem or branch, different in color from the sapwood","synonyms":[],"antonyms":[],"example":"A popular myth is that heartwood is stronger than sapwood."}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/heartwood"]}]