放ほう射しゃ率りつMeanings1nounemissivityphysicsPhysics term: the ratio of radiation emitted by a surface to that emitted by a blackbody at the same temperature.この材ざい料りょうの放ほう射しゃ率りつは0.9以い上じょうです。The emissivity of this material is 0.9 or higher.
