/ Dictionary / Index D diaphysis: Meaning and Definition of Find definitions for: di•aph•y•sis Pronunciation: (dī-af'u-sis), [key] — pl. -ses the shaft of a long bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diaphysis (Thesaurus) diaphragm shutter diapir Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language