[{"Bold_text": "noun", "List Items": ["luminance(def2) luminance(def2).", "the quality of being intellectually brilliant, enlightened, inspired, etc.:The luminosity of his poetry is unequaled.", "something luminous .", "Astronomy.the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun.", "Also calledluminos?ity fac?tor.Optics.the brightness of a light source of a certain wavelength as it appears to the eye, measured as the ratio of luminous flux luminous fluxto radiant flux at that wavelength."]}]