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Dictionary definition for: Iris

1. (n) plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals

2. (n) muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye

3. (n) diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening

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