Unscramble

p 3 h 4 o 1 s 1 p 3 h 4 o 1 r 1 e 1 s 1 c 3 e 1 n 1 t 1

14 letters · 26 points in Scrabble

Meaning

adjective emitting light without appreciable heat as by slow oxidation of phosphorous

originFrom phosphorus + -escent. It's interesting to note that phosphorus is not phosphorescent. Some phosphoric mixtures can be luminescent through chemical reactions, but none exhibit literal phosphorescence.

Etymology from Wiktionary, CC BY-SA 3.0

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