/ Dictionary / Index A arthrodire: Meaning and Definition of Find definitions for: ar•thro•dire Pronunciation: (är'thru-dīr"), [key] — n. any of numerous fishes of the extinct order Arthrodira, widely distributed during the Devonian Period, having the anterior part of the body covered by a shield of bony plates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arthrodia arthrogram Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language