phosphorescence
This term describes a specific type of luminescence where light is emitted slowly over time after the energy source is removed. It evokes a ghostly, ethereal, or supernatural quality, often associated with deep-sea creatures or glowing minerals in a dark cave.
As an uncountable noun, it refers to the phenomenon or the quality of the light itself. It does not have a plural form in standard usage, as it describes a physical property rather than a discrete object.
Meanings
The emission of light by a substance without the combustion of oxygen or the production of heat, specifically light that continues to be emitted after the source of excitation has been removed.
The deep-sea fish exhibited a ghostly phosphorescence in the midnight zone.
Examples
The mineral exhibits a persistent phosphorescence after exposure.
The product design utilizes phosphorescence for safety visibility.