Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An instrument used to measure the rotations per minute of a rotating shaft.
Century Dictionary and Cyclopedia
- n. An instrument for measuring velocity. Specifically— A contrivance for indicating small variations in the velocity of machines, one form of which consists of a cup and a tube opening into its center, both being partly filled with mercury or a colored fluid, and attached to a spindle. This apparatus is whirled round by the machine, and the centrifugal force produced by this whirling causes the mercury to recede from the center and rise upon the sides of the cup. The mercury in the tube descends at the same time, and the degree of this descent is measured by a scale attached to the tube. The velocity of the machine being lessened, the mercury rises in the center, causing a proportionate rise in the tube.
Wiktionary
- n. A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile.
- n. A device for measuring or indicating velocity or speed, as of blood, a river, a machine, etc..
GNU Webster's 1913
- n. An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.
- n. An instrument for measuring the velocity of running water in a river or canal, consisting of a wheel with inclined vanes, which is turned by the current. The rotations of the wheel are recorded by clockwork.
- n. An instrument for showing at any moment the speed of a revolving shaft, consisting of a delicate revolving conical pendulum which is driven by the shaft, and the action of which by change of speed moves a pointer which indicates the speed on a graduated dial.
- n. An instrument for measuring the velocity of the blood; a hæmatachometer.
WordNet 3.0
- n. measuring instrument for indicating speed of rotation
Etymologies
- Greek takhos, speed + -meter.
Examples
“To wit: The tachometer is the size of a wristwatch tucked into the left corner behind the steering wheel you can switch the display on the LCD screen, while the option for connecting to an iPhone takes prime and primary placement in the center console screen.”
“Now, there's a reason that, for about as long as we've had motorcars, a tachometer has been a round face with a needle: it works beautifully.”
“The tachometer is a logical choice, but I have a better idea: tap into pin #34 of the EEC-IV computer so the lights run off fuel flow calculations.”
“The digital instrumentation panel on the dash features a speedometer, tachometer, odometer, two trip meters, and hour meter, fuel gauge, clock, and service indicators.”
“But what most flabbergasted me was the instrument panel — the speedometer, the tachometer, the fuel and temperature gauges.”
“My foot mashed the accelerator to the floor and I caught sight of the tachometer needle in my peripheral vision arcing up, higher and higher.”
“Among its features: a solid stainless casing treated with a film of ionized ceramic and metal that creates a slick, impervious surface; quartz movement with a 12-hour chronograph function; date display; tachometer (it can measure speed over a known distance) and really bright luminous hands and numerals.”
“What I can vouch for, after wearing this last deer season in woods from Saskatchewan to New York, is that the chronograph works, the date display works, the tachometer works, and the thing keeps time as only a Swiss watch can.”
“The one on the left presents vehicle information, such as miles traveled, and allows you to customize some of the gauges so that, for instance, you can finally banish that tachometer you never use in favor of, say, a digital readout on gas-mileage efficiency.”
The Wall Street Journal: Ford Drives Digital Dashboards to Next Level
“Also, the Hyundai shares with its larger sibling Sonata a tendency to get a bit thrashy at certain parts of the tachometer.”
The Wall Street Journal: Hyundai Takes a Bold Stand in the Compact Race
Lists
These user-created lists contain the word ‘tachometer’.
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measure for measure
Things that can be used to measure other things.
osmometer, thermometer, spectrometer, ruler, rain gauge, ph meter, spectrophotometer, odometer, tachometer, compass, brannock device, tape measure and 51 more...
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tacho-, tachy-
relating to speed; rapid
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