[{"word":"precursors","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"That which precurses: a forerunner, predecessor, or indicator of approaching events.","synonyms":[],"antonyms":[]},{"definition":"One of the compounds that participates in the chemical reaction that produces another compound.","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/precursor","https://en.wiktionary.org/wiki/precursors"]}]