3. (Zoöl.)
Defn: A calcareous plate which divides the cavity of certain shells into two parts.
4. (Opt.)
Defn: A plate with an opening, which is generally circular, used in instruments to cut off marginal portions of a beam of light, as at the focus of a telescope.
5. (Mach.)
Defn: A partition in any compartment, for various purposes. Diaphragm pump, one in which a flexible diaphragm takes the place of a piston.
DIAPHRAGMATIC
Di`a*phrag*mat"ic, a. Etym: [Cf. F. diaphragmatique.]
Defn: Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.
DIAPHYSIS
Di*aph"y*sis, n. Etym: [Gr.
1. (Bot.)