/ Dictionary / Index A amphiarthrosis: Meaning and Definition of Find definitions for: am•phi•ar•thro•sis Pronunciation: (am"fē-är-thrō'sis), [key] — pl. -ses a joint permitting only slight motion, as that between the vertebrae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Amphiaraus amphiaster Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language