luminosity

noun

The condition or quality of being luminous.

noun

Something luminous.

noun

The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.

noun

The quality of being luminous or bright; luminousness; the radiation or reflection of light.

noun

Specifically, the intensity of light in a color, measured photometrically.

noun

In botany, phosphorescence.

noun

The quality or state of being luminous; luminousness.

noun

the state of being luminous, or a luminous object; brilliance or radiance

noun

the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor

noun

the rate at which a star radiates energy in all directions