irido-, irid-, iri-, iris- +
(Greek: iris [relating to the eye]; the rainbow; colored circle, colored portion of the eye [originally, "something bent or curved"])
2. A lustrous rainbow-like play of color caused by differential refraction of light waves (as from an oil slick, soap bubble, or fish scales) that tends to change as the angle of view changes.
3. A condition of color marked by changing the hue and metallic sheen.
It is produced by the reflection and refraction of different lengths of light waves on the apparently colored surfaces. The effect is seen in certain birds, fish, and reptiles.
2. Having a lustrous or brilliant appearance.
3. Having a rainbow-like display of colors in reflected light; such as, in mother-of-pearl; also a reference to a colony of microorganisms.
2. Repositioning of the pupil of the eye by fixation of a sector of iris in a corneal or limbal incision.
3. Iris inclusion surgery for glaucoma, in which the iris is interposed in a corneoscleral (cornea and white outer coat of the eyeball) incision to block its closure.
2. A very hard and brittle, exceptionally corrosion-resistant, whitish-yellow metallic element occurring in platinum ores and used principally to harden platinum and in high-temperature materials, electrical contacts, and wear-resistant bearings.
3. Etymology: from 1804, Modern Latin, coined by its discoverer, English chemist Smithson Tennant (1761-1815) from Greek iris, "rainbow"; so called for the varying color of its compounds.
More information is located at Chemical Element: iridium.
2. The subjective perception of iridescent halos around lights, occurring in glaucoma.
2. To point or tip with iridium; such as, a gold pen.
It contains crystalline guanin which breaks light into a spectrum of colors and produces iridescence.