You searched for: “actinometers”
actinometer (s) (noun), actinometers (pl)
An instrument for measuring the intensity and penetrating power of actinic rays: An actinometer is a device for assessing light energy, especially solar and terrestrial radiation.
An actinometer is an implement used for determining the intensity of radiation by measuring the fluorescence produced by it.
This entry is located in the following units: actino-, actin-, actini-, -actinal, actis- + (page 3) meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre (page 1)