actinometer.
An instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.
Meaning & usage
An instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.
Where this word comes from
Etymology tree Ancient Greek ᾰ̓κτῑ́ς (ăktī́s)der. English actino- Proto-Indo-European *meh₁- Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron)lbor. French -mètrebor. English -meter English actinometer From actino- + -meter.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.