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iris | 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 | ||
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flag, fleur-de-lis, iris, sword lily | plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals | ||
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iris, iris diaphragm | diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening |