tachometer

== English == === Alternative forms === tachometre (nonstandard) === Etymology === From tacho- +‎ -meter. === Pronunciation === IPA(key): /təˈkɒmətə(ɹ)/ === Noun === tachometer (plural tachometers) A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile. A device for measuring or indicating velocity or speed, as of blood, a river, a machine, etc. ==== Synonyms ==== rev counter tach (clipped form) ==== Coordinate terms ==== speedometer tachograph (tacho) ==== Related terms ==== tachygraphy ==== Related terms ==== tachymeter ==== Translations ==== === Anagrams === tachometre