| iridescent | Presenting multiple bright refractile colours, typically as a result of optical interference when incident white light is broken into its spectral components when reflected back through several thin-layered films. Origin: G. Iris, rainbow (05 Mar 2000) |
|---|---|
| iridescent virus | An insect virus in the family Iridoviridae. (05 Mar 2000) |
| iridesis | Ligature of a portion of the iris brought out through an incision in the cornea. Origin: irido-+ G. Desis, a binding together (05 Mar 2000) |
| iridial | Relating to the iris. Synonym: iridial, iridian, iridic. (05 Mar 2000) |
| iridial part of retina | iridial part of retina |
| iridic | <chemistry> Of or pertaining to iridium; said specifically of those compounds in which iridium has a relatively high valence. Source: Websters Dictionary (01 Mar 1998) |
| iridin | 1. Irigenin 7-glucoside from orris root, Iris florentina. 2. A resinoid from blue flag, Iris versicolor; used as a cholagogue and cathartic. Synonym: irisin. (05 Mar 2000) |
| iridioscope | <instrument> A kind of ophthalmoscope. See: Iris, and -scope. Source: Websters Dictionary (01 Mar 1998) |
| iridious | <chemistry> Of or pertaining to iridium; applied specifically to compounds in which iridium has a low valence. Source: Websters Dictionary (01 Mar 1998) |
| iridium | <chemistry, element> A rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Iridium usually occurs as a native alloy with osmium (iridosmine or osmiridium), which may occur alone or with platinum. Iridium, as an alloy with platinum, is used in bushing the vents of heavy ordnance. It is also used for the points of gold pens, and in a finely powdered condition (iridium black), for painting porcelain black. Atomic weight: 192.5 Abbreviation: Ir Origin: NL, fr. L. Iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris. (30 Mar 1998) |
| iridium radioisotopes | Unstable isotopes of iridium that decay or disintegrate emitting radiation. Ir atoms with atomic weights 182-190, 192, and 194-198 are radioactive iridium isotopes. (12 Dec 1998) |
| irido- | Irid- The iris. Origin: G. Iris (irid-), rainbow (05 Mar 2000) |
| iridoavulsion | Avulsion, or tearing away, of the iris. (05 Mar 2000) |
| iridocele | Herniation of a portion of the iris through a corneal defect. Origin: irido-+ G. Kele, hernia (05 Mar 2000) |
| iridochoroiditis | Inflammation of both iris and choroid. (05 Mar 2000) |