Definition of Tachometer

1. Noun. Measuring instrument for indicating speed of rotation.

Exact synonyms: Tach
Generic synonyms: Measuring Device, Measuring Instrument, Measuring System
Specialized synonyms: Tachograph

Definition of Tachometer

1. n. An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.

Definition of Tachometer

1. Noun. A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile. ¹

2. Noun. A device for measuring or indicating velocity or speed, as of blood, a river, a machine, etc. ¹

¹ Source:

Definition of Tachometer

1. [n -S]

Medical Definition of Tachometer

1. An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance. Specifically: 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. 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. An instrument for measuring the velocity of the blood; a haematachometer. Origin: Gr. Swiftness, speed (fr. Quick): cf. F. Tachometre. Source: Websters Dictionary (01 Mar 1998)

Tachometer Pictures

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Lexicographical Neighbors of Tachometer

tachometer (current term)
tachybradycardia syndrome
tachycardia-bradycardia syndrome
tachycardia en salves

Literary usage of Tachometer

Below you will find example usage of this term as found in modern and/or classical literature:

1. Mechanical Laboratory Methods: The Testing of Instruments and Machines in by Julian Chase Smallwood (1922)
"Still another recording tachometer consists of a small generator, driven by the shaft considered, whose speed variations are evidenced by the generator ..."

2. Engineering Instruments & Meters by Edgar A. Griffiths (1921)
"Alternating current tachometer ...... 172 188. Squirrel cage tachometer . ... Mechanism of mercury tachometer ..... 17(i 193. Section of instrument . ..."

3. The Operative Mechanic, and British Machinist;: Being a Practical Display of by John Nicholson (1826)
"He received a gold medal from the Society of Arts, Manufactures, and Commerce, in 1810, for this instrument, which he calls a tachometer. ..."

4. The Principles and Practice of Canal and River Engineering by David Stevenson (1872)
"Discharge of rivers—Mode of determining the velocity of a river; by floats; by tachometer—Formula for reducing the surface to mean velocity— Methods of ..."

5. Textbook of Naval Aeronautics by Henry Woodhouse (1917)
"tachometer. Oil gage. Oil pressure gage. Gasoline gage. Gasoline flow indicator. Distance indicator. Barograph. Angle of attack indicator. ..."

6. Mechanics of Engineering and of Machinery by Julius Ludwig Weisbach, Gustav Herrmann, Joseph Frederic Klein (1878)
"... tube is not so accurate as the tachometer, yet, on account of its simplicity, it can be highly recommended. The author has discussed tliis instrument at ..."

7. The Repertory of Patent Inventions: And Other Discoveries and Improvements (1812)
"This advantage, it is hoped, may be derived from the tachometer, for it is an instrument which ... A front view of" the tachometer is represented in Fig. ..."

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