/ Dictionary / Index S sphenoid: Meaning and Definition of Find definitions for: sphe•noid Pronunciation: (sfē'noid), [key] — adj. —n. the sphenoid bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sphenoid (Thesaurus) sphenography sphenopsid Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language