actinometric, a.
(ˌæktɪnəʊˈmɛtrɪk)
[f. actino- + µετρικός measuring.]
Of or pertaining to the measurement of the intensity of the sun's heat.
| 1849 Sir J. Herschel Admiralty Man. Sci. Enq. 295 The ultimate reduction of the actinometric observations. 1881 Eng. Mech. 27 May 280/1 Some actinometric measurements were made last autumn at different heights in the Alps, by M. Puiseux..The activity of this [vegetation] at Montsouris was proved to be in direct proportion to the actinometric degree. |