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

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)

Browse

Next Word in the Dictionary: iris familyPrevious Word in the Dictionary: iris borerAll Words Near: iris diaphragm
July 05, 2015
bunkum Hear it
insincere or foolish talk
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears