Cite
 

Dictionary


i'ris di"aphragm



Optics, Photog.
a composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system. Also called iris.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

irisationiris family
See also:

 

Related Content