/ Dictionary / Index S sphenic: Meaning and Definition of Find definitions for: sphe•nic Pronunciation: (sfē'nik), [key] — adj. wedge-shaped. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sphene spheno- Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language