ACTINOMETER
Source: 567
Ac′ti‐nom″e‐ter (�), n. [[Gr. �, �, ray + -meter]] (a) An instrument for measuring the direct heating power of the sun's rays. (b) An instrument for measuring the actinic effect of rays of light.
Source: 567
Ac′ti‐nom″e‐ter (�), n. [[Gr. �, �, ray + -meter]] (a) An instrument for measuring the direct heating power of the sun's rays. (b) An instrument for measuring the actinic effect of rays of light.