a camera shutter having a group of overlapping blades that open and close at the center when exposing film.
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- iris diaphragm,
- iris family,
- iris pit,
- iris-nevus syndrome,
Also called between-the-lens shutter, diaphragm shutter, iris diaphragm shutter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019