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iris
noun
diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
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Pronunciation
ˈaɪɹɪs
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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
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