Irises
Last Updated: January 2, 2026 at 12:30 PM
Scrabble:6 ptsWWF:6 pts6 letters
Definition of Irises
noun
- A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms (See Iris (plant)).
- The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and which forms the colored portion of the eye (See Iris (anatomy)).
- A diaphragm used to regulate the size of a hole, especially as a way of controlling the amount of light reaching a lens.
- A rainbow, or other colourful refraction of light.
- A constricted opening in the path inside a waveguide, used to form a resonator.