Actinometer

Definition:

• (n.) An instrument for measuring the direct heating power of the sun's rays.
• (n.) An instrument for measuring the actinic effect of rays of light.

Compare actinometer with other words:

actinograph vs. actinometer

actinometer vs. actinometry

actinometer vs. actinometric

actinometer vs. radiation

actinometer vs. solar

actinometer vs. power

actinometer vs. heating

actinometer vs. measure