Dynactinometer
Dynactinometer Dy*nac`ti*nom"e*ter, n. [Gr. ? power + E. actinometer.] An instrument for measuring the intensity of the photogenic (light-producing) rays, and computing the power of object glasses. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • dynactinometer — dynactiˈnometer ? Obs. [f. Gr. δύν(αµις power + ἀκτίς (ἀκτῑν ) ray + µέτρον measure: see meter, and cf. actinometer.] An instrument designed to measure the intensity of the photogenic rays, and to compute the power of object glasses. M. Claudet… …   Useful english dictionary

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