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Any of several radiometric instruments, such as a pyrheliometer, used chiefly for meteorological measurements of terrestrial and solar radiation.

ac′ti·no·met′ric (-nō-mĕt′rĭk), ac′ti·no·met′ri·cal adj.
ac′ti·nom′e·try n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Adj.1.actinometrical - of or related to actinometryactinometrical - of or related to actinometry  
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References in periodicals archive ?
Chroscicki, "Calculation methods of determining the value of daylight's intensity on the ground of photometric and actinometrical measurements," in Proceedings of CIE Conference, vol.
Our result fits well the relationships between specific humidity and incoming longwave radiation obtained from the analysis of measurement data from BSRN as well as some other actinometrical stations (Ruckstuhl et al., 2007; Stanhill, 2011; Rosa and Stanhill, 2014).