(ī′ris) noun plural i·ris·es or ir·i·des (ir′·ə·dēz, ī′rə-)
1. Anat. The colored circular, contractile membrane between the cornea and the lens of the eye, whose central perforation is occupied by the pupil. See illustration under EYE.
2. Bot. Any one of a notable genus (Iris) of plants with sword–shaped leaves and large handsome flowers: the cultivated varieties are also known as fleur–de–lis.
3. The orris.
4. The rainbow; any similar iridescent appearance.
5. Rainbow quartz. [<L iris rainbow, iris <Gk. iris]
IRIS
a. Bearded iris.
b. Japanese iris.
c. Siberian iris.

(ī′ris)
In Greek mythology the goddess of the rainbow, attendant of Zeus and Hera; in Homer's Illiad, the messenger of the gods.

(ī′ris)
The ancient name for the YESIL IRMAK, Turkey.