phosphorescent adjective 1noun 1forms 3 adjective1 •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.So he imports this special breed of scorpions and feeds them on metal meal and the scorpions turned a phosphorescent blue color and sort of hummed. — 1966 noun1 •A phosphorescent substance. formsphosphorescents · more phosphorescent · most phosphorescent
