1 entry 1 source
Actinometer
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
1. An instrument for measuring the direct heating power of the sun's rays.
2. An instrument for measuring the actinic effect of rays of light.
1 entry 1 source
Part of speech: noun (n.)
1. An instrument for measuring the direct heating power of the sun's rays.
2. An instrument for measuring the actinic effect of rays of light.