Iris

[ahy-ris] /ˈaɪ rɪs/

noun, plural irises, irides
[ir-i-deez, ahy-ri-] /ˈɪr ɪˌdiz, ˈaɪ rɪ-/ (Show IPA)
1.
Anatomy. the contractile, circular diaphragm forming the colored portion of the eye and containing a circular opening, the pupil, in its center.
2.
Botany. any plant of the genus Iris, having showy flowers and sword-shaped leaves.
Compare .
3.
a flower of this plant.
4.
(initial capital letter) Classical Mythology. a messenger of the gods, regarded as the goddess of the rainbow.
5.
a rainbow.
6.
any appearance resembling a rainbow.
7.
Movies, Television. an iris-in or iris-out.
8.
Optics, Photography. .
verb (used without object)
9.
Movies. to begin or end a take or scene with an iris-in or iris-out, achieved by manipulation of an on the camera or by editing the film.
[ahy-ris] /ˈaɪ rɪs/
noun
1.
a female given name.
/ˈaɪrɪs/
noun (pl) irises, irides (ˈaɪrɪˌdiːz; ˈɪrɪ-)
1.
the coloured muscular diaphragm that surrounds and controls the size of the pupil
2.
Also called fleur-de-lys. any plant of the iridaceous genus Iris, having brightly coloured flowers composed of three petals and three drooping sepals See also flag3 , orris1 , stinking iris
3.
Also called rainbow quartz. a form of quartz that reflects light polychromatically from internal fractures
4.
a rare or poetic word for rainbow
5.
something resembling a rainbow; iridescence
6.
short for iris diaphragm
/ˈaɪrɪs/
noun
1.
the goddess of the rainbow along which she travelled to earth as a messenger of the gods
n.

late 14c., flowering plant (Iris germanica), also “prismatic rock crystal,” from Latin iris (plural irides) “iris of the eye, iris plant, rainbow,” from Greek iris (genitive iridos) “a rainbow; the lily; iris of the eye,” originally “messenger of the gods,” personified as the rainbow. The eye region was so called (early 15c. in English) for being the colored part; the Greek word was used of any brightly colored circle, “as that round the eyes of a peacock’s tail” [Liddell and Scott].

iris i·ris (ī’rĭs)
n. pl. i·ris·es or i·ri·des (ī’rĭ-dēz’, ĭr’ĭ-)
The round pigmented contractile membrane of the eye that is perforated in the center by the pupil, forms the front part of the vascular tunic, and is attached on the margin to the ciliary body.
i’ri·dal (ī’rĭ-dl, ĭr’ĭ-) or i·rid’i·al (ī-rĭd’ē-əl, ĭ-rĭd’-) or i·rid’i·an adj.
iris
(ī’rĭs)
Plural irises or irides (ī’rĭ-dēz’, ĭr’ĭ-)
The colored, muscular ring around the pupil of the eye in vertebrate animals, located between the cornea and lens. Contraction and expansion of the iris controls the size of the pupil, thereby regulating the amount of light reaching the retina.
iris [(eye-ris)]

The colored membrane of the eye, surrounding the pupil, which by contracting and expanding regulates the amount of light that enters the eye.

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