iris diaphragm
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.iris diaphragm
nounDefinition of IRIS DIAPHRAGM
: an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens
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First Known Use of IRIS DIAPHRAGM
1867
iris diaphragm
noun (Medical Dictionary)Medical Definition of IRIS DIAPHRAGM
: an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens (as in a microscope)
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