Definitions
from The Century Dictionary.
- noun An instrument for measuring the intensity of actinic power, or for comparing the quickness of lenses.
from the GNU version of the Collaborative International Dictionary of English.
- noun An instrument for measuring the intensity of the photogenic (light-producing) rays, and computing the power of object glasses.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An
instrument formeasuring theintensity ofphotogenic rays and computing the power of object glasses.
Etymologies
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