Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: iris diaphragm  'I-ris 'dI-u,fram
  1. Diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
    - iris

Derived forms: iris diaphragms

Type of: diaphragm, stop

Encyclopedia: Iris diaphragm