(plural irises or iris or irides) (See Usage notes)
- (botany) A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms .
- (anatomy) The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and which forms the colored portion of the eye .
- (photography, cinematography) A diaphragm used to regulate the size of a hole, especially as a way of controlling the amount of light reaching a lens.
- (poetic) A rainbow, or other colourful refraction of light.
- (electronics) A constricted opening in the path inside a waveguide, used to form a resonator.
For the part of the eye, the usual medical plural is irides.For the flower both iris and irises are in common use.
(third-person singular simple present irises, present participle irising, simple past and past participle irised)
- (of an aperture, lens, or door) To open or close in the manner of an iris.
From Middle English, from Latin, from Ancient Greek ἶρις (iris, “rainbow”), from Proto-Indo-European *wei-ro- (“a twist, thread, cord, wire”), from Proto-Indo-European *wei- (“to turn, twist, weave, plait”).
- (Greek mythology) A messenger of the gods, and goddess of rainbows.
- A female given name; a flower name used since the end of the 19th century.
- (astronomy) 7 Iris, an asteroid
Ancient Greek Ἶρις iris "rainbow".
- Alternative form of irid-.