SG Heritage Dictionary

Diaphragm [Noun] Webster's Dictionary 1828

1. Diafram. [Gr., to break off, to defend.]

2. In anatomy, the midriff, a muscle separating the chest or thorax from the abdomen or lower belly.

3. A partition or dividing substance.

Diaphragm [Noun] Webster's Dictionary 1913

1. A dividing membrane or thin partition, commonly with an opening through it.

2. The muscular and tendinous partition separating the cavity of the chest from that of the abdomen; the midriff.

3. A calcareous plate which divides the cavity of certain shells into two parts.

4. 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. A partition in any compartment, for various purposes.

Diaphragmatic [Adjective] Webster's Dictionary 1913

Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.