Close up of a brown iris.
- The definition of iris is being of the family of plants known as Iridaceace.
An example of iris used as an adjective is in the phrase "iris family," which means a flower from this family such as an iris, a lily or a gladiolus.
- The iris is defined as the colored part of the eye around the pupil, the name of a woman, or a three-petal flower with sword-shaped leaves.
- An example of an iris is the part of the eye that opens and closes to control how much light enters the pupil.
- An example of an iris is a blue flower with three petals, each with a sepal, on a stock growing with long pointed leaves.
- a rainbow
- a rainbowlike show or play of colors
- the round, pigmented membrane surrounding the pupil of the eye, having muscles that adjust the size of the pupil to regulate the amount of light entering the eye
- any of a large genus (Iris) of perennial plants of the iris family, with sword-shaped leaves and conspicuous flowers composed of three petals and three drooping sepals of widely varying color
- the flower of these plants
Origin of irisLate Middle English ; from Classical Latin ; from Classical Greek iris (gen. iridos) ; from Indo-European an unverified form wir- (from source wire) ; from base an unverified form wei-, to turn, bend
- a feminine name
- Gr. Myth. the goddess of the rainbow: in the Iliad, she is the messenger of the gods
Origin of IrisClassical Latin ; from Classical Greek Iris: see iris
Origin of IrisLatin &Imacron;ris, from Greek, from &imacron;ris, rainbow; see wei- in Indo-European roots.
nounpl. i·ris·es or i·ri·des
- The pigmented, round, contractile membrane of the eye, suspended between the cornea and lens and perforated by the pupil. It regulates the amount of light entering the eye.
- Any of numerous widely cultivated plants of the genus Iris, having narrow sword-shaped leaves and showy, variously colored flowers.
- A rainbow or rainbowlike display of colors.
- An iris diaphragm.
Origin of irisMiddle English, iris (the plant), from Latin &imacron;ris, &imacron;rid-, rainbow, iris (the plant), from Greek, rainbow, brightly-colored gemstone, iris of the eye; see wei- in Indo-European roots.
Iris &botx; robusta
(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)
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”).
Ancient Greek Ἶρις iris "rainbow".
- Alternative form of irid-.
iris - Computer Definition
(1) The name of SGI's first graphics terminals and workstations. The name was later used for SGI's high-availability software for its servers (IRIS FailSafe).
(2) (Infrastructure for Resilient Internet Systems) See DHT.