phosphor phosphoprotein • phosphorate · · · Info · Definitions · Characters · · phosphor · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a synthetic substance that is fluorescent or phosphorescent; used to coat the screens of cathode ray tubes. · · Noun Definition 1 Characters · · h latin small letter h U+0068 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073