from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having the property of emitting light for a period of time after the source of excitation is taken away, e.g., in electrostatic storage tubes and cathode-ray tubes.
- n. A phosphorescent substance.
from the GNU version of the Collaborative International Dictionary of English
- adj. Shining with a phosphoric light; luminous without sensible heat.
from The Century Dictionary and Cyclopedia
- Shining with a faint light or luminosity like that of phosphorus; luminous without sensible heat.
- n. A substance having the property of phosphorescence, or luminosity without heat.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. emitting light without appreciable heat as by slow oxidation of phosphorous
From phosphorus + -escent. It's interesting to note that technically phosphorus is not phosphorescent. Phosphorus is luminescent, it gives off light from a chemical reaction, as opposed to re-emission of absorbed energy (phosphorescence). (Reference: John Emsley, The Shocking History of Phosphorus, ISBN 0-330-39005-8.) (Wiktionary)