| IRI | inflammation of the iris and cornea of the eye |
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| IRI | swelling of the iris of the eye |
| IRI | a genus of Hirundinidae |
| IRI | bluish-green-and-white North American swallow |
| IRI | a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum) |
| IRI | a surgical procedure that makes an incision in the iris of the eye in order to enlarge the pupil or to treat glaucoma |
| IRI | diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening |
| IRI | muscular diaphragm that controls the size of the pupil |
| IRI | plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals |
| IRI | low-growing summer-flowering iris of northeastern United States |
| IRI | diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening |
| IRI | large family of usually perennial geophytic herbs with rhizomes or corms or bulbs |