Dictionary
iris diaphragm
noun
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
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Illustration of IRIS DIAPHRAGM
First Known Use of IRIS DIAPHRAGM
1867
Medical Dictionary
iris diaphragm
noun
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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