
1) Measuring device 2) Measuring instrument 3) Measuring system
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https://www.crosswordclues.com/clue/chronoscope

instrument for measuring very short time intervals
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http://phrontistery.info/c.html

• (n.) An instrument for measuring minute intervals of time; used in determining the velocity of projectiles, the duration of short-lived luminous phenomena, etc.
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http://thinkexist.com/dictionary/meaning/chronoscope/

A watch, also known as a wandering-hour watch, introduced c1675, on which the hour is displayed through a semicircular arc in the dial. The numeral, carried on a rotating disc, takes one hour to move around the semicircle and then disappears from view behind a decorated cover, to be replaced by the next hour at the other end. The scale for the min....
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(from the article `Noble, Sir Andrew, 1st Baronet`) About 1862 he applied his invention, the chronoscope, a device for measuring very small time intervals, to determine the velocity of shot in gun ...
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http://www.britannica.com/eb/a-z/c/82

A watch, also known as a wandering-hour watch, introduced c. 1675, on which the hour is displayed through a semicircular arc in the dial. The numeral, carried on a rotating disc, takes one hour to move around the semicircle and then disappears from view behind a decorated cover, to be replaced by the next hour at the other end. The scale for the mi …...
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Chron'o·scope noun [ Greek ... time +
-scope .] An instrument for measuring minute intervals of time; used in determining the velocity of projectiles, the duration of short-lived luminous phenomena, etc.
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http://www.encyclo.co.uk/webster/C/75

The chronoscope is an apparatus invented by Wheatstone in 1840 to measure small intervals of time, and for measuring the duration of extremely short-lived phenomena, such as the electric spark; more especially the name was given to instruments of various forms for measuring the velocity of projectiles.
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[
n] - an instrument for accurate measurements of small intervals of time
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http://www.webdictionary.co.uk/definition.php?query=chronoscope

chronoscope An instrument for observing and the precise measuring of minute time intervals of extremely brief periods of time.
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http://www.wordinfo.info/words/index/info/view_unit/2781/4
noun an instrument for accurate measurements of small intervals of time
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https://www.encyclo.co.uk/local/20974

an electronic instrument for measuring accurately very brief intervals of time, as in determining the velocity of projectiles.
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https://www.infoplease.com/dictionary/chronoscope
No exact match found.