/ Dictionary / Index P phosph-: Meaning and Definition of Find definitions for: phosph- Pronunciation: [key] var. ofbefore a vowel: phosphate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phosgenite phosphagen Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language