English dictionary
iris
nounPronunciation
ˈaɪɹɪs
Audio pronunciation
Parts of speech
Definitions
noun
- diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
noun
- muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye
noun
- plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
