phosphorescence

/ˌfɑsfəˈrɛsəns/
noun
  1. The ability or process of giving off light after being exposed to radiation, continuing even after the radiation source is removed.
    • The phosphorescence of the glow-in-the-dark stickers lasted for hours after the lights went out.
    • Marine biologists study the phosphorescence of jellyfish to understand how they produce light.
    • The watch hands use phosphorescence so you can read the time in the dark.
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