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.
the GNU version of the Collaborative International Dictionary of English
adj. Shining with a phosphoric light; luminous without sensible heat.
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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. emitting light without appreciable heat as by slow oxidation of phosphorous