Dynameter
Pronunciation : Dy*nam"e*ter
Part of Speech : n.
Etymology : [Gr. -meter: cf. F. dynam?tre. Cf. Dynamometer.]
Definition : 1. A dynamometer.
2. (Opt.)
Defn: 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