English dictionary
actinometer
/,/&/kt/@/'n/A/m/I/t/@/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)
Source: WordNet 3.0
-
An instrument for measuring the direct heating power of the sun's rays.
Source: webster1913