diaphragmaladj.
Etymology:  <  diaphragm n. + -al suffix1.Previous versions of the OED give the stress as: diaˈphragmal.
the world > life > the body > internal organs > diaphragm > 			[adjective]		
1890     		(ed. 2)	 iii. 85 		(note)	  				The diaphragmal respiration.
This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2019).