单词 | dynactinometer |
释义 | 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.
1851M. Claudet in Philos. Mag. |

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