irradiance.
The act of irradiating; emission of rays of light.
Meaning & usage
The act of irradiating; emission of rays of light.
That which irradiates or is irradiated; lustre; splendour; brilliancy.
The radiant power received by unit area of surface.
Where this word comes from
Etymology tree English irradiant Latin -ns Latin -āns Latin -ia Latin -āntia Old French -ancebor. Middle English -aunce English -ance English irradiance From irradiant + -ance.
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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.