/ Dictionary / Index S sphingomyelin: Meaning and Definition of Find definitions for: sphin•go•my•e•lin Pronunciation: (sfing"gō-mī'u-lin), [key] any of the class of phospholipids occurring chiefly in the brain and spinal cord, composed of phosphoric acid, choline, sphingosine, and a fatty acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sphingid sphingosine Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language