| 单词 | dynactinometer | 
| 释义 | dynactinometern. ? Obsolete.   An instrument designed to measure the intensity of the photogenic rays, and to compute the power of object-glasses. ΚΠ 1851    M. Claudet in  Philos. Mag.  				 This entry has not yet been fully updated (first published 1897; most recently modified version published online June 2019). < | 
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