Photographometer
Pho`tog´ra`phom´e`ter
| n. | 1. | (Photog.) An instrument for determining the sensibility of the plates employed in photographic processes to luminous rays. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
| n. | 1. | (Photog.) An instrument for determining the sensibility of the plates employed in photographic processes to luminous rays. |