The iris is the round coloured part of a person's eye.
2. countable noun
An iris is a tall plant with long leaves and large purple, yellow, or white flowers.
iris in British English
(ˈaɪrɪs)
nounWord forms: pluralirises or 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
Word origin
C14: from Latin: rainbow, iris (flower), crystal, from Greek
Iris in British English
(ˈaɪrɪs)
noun
the goddess of the rainbow along which she travelled to earth as a messenger of the gods
Iris in American English
(ˈaɪrɪs)
noun
1.
a feminine name
2. Greek Mythology
the goddess of the rainbow: in the Iliad, she is the messenger of the gods
Word origin
L < Gr Iris: see iris
iris in American English
(ˈaɪrɪs)
nounWord forms: pluralˈirises
1.
a rainbow
2.
a rainbowlike show or play of colors
3.
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
4.
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
5.
the flower of these plants
adjective
6.
designating a family (Iridaceae, order Liliales) of monocotyledonous plants, including crocusesand gladioluses
Word origin
LME < L < Gr iris (gen. iridos) < IE *wir- (> wire) < base *wei-, to turn, bend