| n. | 1. | (Class. Myth.) The goddess of the rainbow, and swift-footed messenger of the gods. |
| 2. | The rainbow. | |
| 3. | An appearance resembling the rainbow; a prismatic play of colors. | |
| 4. | (Anat.) The contractile membrane perforated by the pupil, and forming the colored portion of the eye. See Eye. | |
| 5. | (Bot.) A genus of plants having showy flowers and bulbous or tuberous roots, of which the flower-de-luce (fleur-de-lis), orris, and other species of flag are examples. See Illust. of Flower-de-luce. | |
| 6. | (Her.) See Fleur-de-lis, 2. | |
| 7. | (Zool.) the inner circle of an oscillated color spot. | |
| 8. | same as iris diaphragm. |
| Noun | 1. | iris - plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals |
| 2. | iris - muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye | |
| 3. | iris - diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening Synonyms: iris diaphragm |
| 1. | (body) | IRIS - Institute for Research in Information and Scholarship of Brown University (Providence RI). | |
| 2. | Iris - An object-oriented DBMS. |
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