1) Like a diaphragm 2) Of the diaphragm 
• (a.) Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.
Relating to a diaphragm. ... Synonym: phrenic. ... (05 Mar 2000) ... 
Di`a·phrag·mat'ic adjective [ Confer French diaphragmatique .] Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves. 
Type: Term Pronunciation: dī′ă-frag-mat′ik Definitions: 1. Relating to a diaphragm. Synonyms: phrenic1
diaphragmatic Relating to, of the nature of, or referring to, a diaphragm.
of the diaphragm. · like a diaphragm.