dynactinometer

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 in Philos. Mag.

Useful english dictionary. 2012.

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  • 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

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