Diaphragm pump, one in which a flexible diaphragm takes the place of a piston.
Di`a*phrag*mat"ic (?), a. [Cf. F. diaphragmatique.] Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.
Di*aph"y*sis (?), n. [Gr. &?; a growing through; dia` through + &?; to bring forth.] 1. (Bot.) An abnormal prolongation of the axis of inflorescence.