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DYNAMETER
Noun
dynameter (plural dynameters)
An instrument used to measure the magnification of a telescope.
Source: Wiktionary
Dy*nam"e*ter, n. Etym: [Gr. -meter: cf. F. dynamètre. Cf. Dynamometer.]
1. A dynamometer.
2. (Opt.)
Definition: An instrument for determining the magnifying power of telescopes, consisting usually of a doubleimage micrometer applied to the eye end of a telescope for measuring accurately the diameter of the image of the object glass there formed; which measurement, compared with the actual diameter of the glass, gives the magnifying power.
Source: Webster’s Unabridged Dictionary 1913 Edition
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