[{"word":"tachometers","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile.","synonyms":[],"antonyms":[]},{"definition":"A device for measuring or indicating velocity or speed, as of blood, a river, a machine, etc.","synonyms":[],"antonyms":[]}],"synonyms":["rev counter"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/tachometer","https://en.wiktionary.org/wiki/tachometers"]}]