luminescence /-esˈəns/ noun

1. Emission of light otherwise than by incandescence and so at a relatively cool temperature
2. The light so emitted

luminescˈent adjective

luminifˈerous adjective

Giving, yielding, or being the medium of, light

luˈminist noun

A luminarist

luminosity /-osˈi-ti/ noun

1. Luminousness
2. The measure of the quantity of light actually emitted by a star, irrespective of its distance

luˈminously adverb

luˈminousness noun

luminance signal noun

A signal controlling the luminance of a colour TV picture, ie its image brightness, as distinct from its chrominance

luminous energy noun

Energy emitted in the form of light

luminous flux noun

A measure of the rate of flow of luminous energy

luminous intensity noun

A measure of the amount of light radiated in a given direction from a point source

luminous paint noun

A paint that glows in the dark, those that glow continuously having radioactive additives