from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An instrument used to measure light intensity.
from the GNU version of the Collaborative International Dictionary of English
- n. an instrument for measuring the intensity of light; a photometer.
from The Century Dictionary and Cyclopedia
- n. A photometer.
- n. A sunshine-recorder designed to measure the combined effect of the duration and intensity of sunshine in promoting evaporation.
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