/ Dictionary / Index P phosphor: Meaning and Definition of Find definitions for: phos•phor Pronunciation: (fos'fur, -fôr), [key] — n. any of a number of substances that exhibit luminescence when struck by light of certain wavelengths, as by ultraviolet. a phosphorescent substance. —adj. phosphorescent. Phos•phor Pronunciation: (fos'fur, -fôr), [key] — n. the morning star, esp. Venus. phosphor- Pronunciation: [key] var. ofbefore a vowel: phosphorate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phosphor (Thesaurus) phosphoprotein phosphorate Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language