Definify.com
Webster 1913 Edition
Tachometer
Ta-chom′e-ter
,Noun.
[Gr.
τάχοσ
swiftness, speed (fr. ταχύσ
quick) + -meter
: cf. F. tachomètre
.] An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.
Specifically: –(a)
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.
(b)
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.
(c)
(Physiol.)
An instrument for measuring the velocity of the blood; a haematachometer.
Definition 2024
Tachometer
Tachometer
See also: tachometer
tachometer
tachometer
See also: Tachometer
English
Alternative forms
- tachometre (nonstandard)
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
Related terms
- (device for measuring velocity): speedometer
Translations
device for measuring rpm
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device for measuring velocity — see speedometer