adjective.
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.
noun.
A phosphorescent substance.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
emitting light without appreciable heat as by slow oxidation of phosphorous
Word Usage
"Extract from a letter by Mr. S.C. Patterson, second officer of the P. and O. steamship _Delta_: a spectacle which the _Journal_ continues to call phosphorescent:"