[{"word":"rf","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"That part of the electromagnetic spectrum, between about 3 kHz and 300 MHz, within which radio waves are transmitted.","synonyms":[],"antonyms":[]},{"definition":"A frequency in this range.","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/radio%20frequency","https://en.wiktionary.org/wiki/rf"]}]