/ Dictionary / Index P phospholipid: Meaning and Definition of Find definitions for: phos•pho•lip•id Pronunciation: (fos"fō-lip'id), [key] — n. Biochem. any of a group of fatty compounds, as lecithin, composed of phosphoric esters, and occurring in living cells. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phospholipid (Thesaurus) phospholipase phospholipid bilayer 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