noun🔗ShareAny of various compounds of transition metals or of rare earths that exhibit phosphorescence."The old clock used a phosphor on its hands, making them glow in the dark so we could see the time at night. "compoundsubstancematerialchemistryphysicsChat with AIVocabulary GamePractice Reading
noun🔗SharePhosphorus."The match head contained red phosphor, which ignited when struck against the rough surface. "elementsubstancechemistrymaterialChat with AIVocabulary GamePractice Reading
