01 n. A dividing membrane or thin partition, commonly with an opening through it.
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1.
A dividing membrane or thin partition, commonly with an opening through it.
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2.
The muscular and tendinous partition separating the cavity of the chest from that of the abdomen; the midriff.(Anat.)
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3.
A calcareous plate which divides the cavity of certain shells into two parts.(Zool.)
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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.(Opt.)
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5.
A partition in any compartment, for various purposes.(Mach.)
Phrases & compounds
Diaphragm pump —
one in which a flexible diaphragm takes the place of a piston.