IPA: /ˌfɒsfəˈrɛsəns/
KK: /fɑsˈfɔrɛsəns/
The release of light by a substance after it has absorbed energy, which continues for a period of time even after the energy source is removed.
The phosphorescence of the glow-in-the-dark stars on the ceiling amazed the children.
Phosphorescence → It is formed from "phosphor" (from Greek "phosphoros", meaning light-bringer) and "-escence" (meaning the process of becoming). The word describes the process of becoming light-bringing or emitting light without burning.
Imagine something that 'brings light' ('phosphor') and is in the process of 'becoming' ('-escence') — that's how phosphorescence means the process of emitting light.