phosphorescent
phosp·ho·res·cent
adjective
1.
emitting light without appreciable heat as by slow oxidation of phosphorous
- “the phosphorescent glow of decaying wood”
Origin
From 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.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.