iris

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Lying behind the cornea, the iris is the eyeas equivalent of a cameraas shutter.

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Definitions (28)

Toggle American Heritage definitions American Heritage Dictionary (4)

  1. noun The pigmented, round, contractile membrane of the eye, suspended between the cornea and lens and perforated by the pupil. It regulates the amount of light entering the eye.
  2. noun Any of numerous plants of the genus Iris, having narrow sword-shaped leaves and showy, variously colored flowers.
  3. noun A rainbow or rainbowlike display of colors.

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Iris has been looked up 239 times, favorited once, listed 34 times, and commented on twice.

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Middle English, iris (the plant), from Latin īris, īrid-, rainbow, iris (the plant), from Greek, rainbow, brightly-colored gemstone, iris of the eye; see wei- in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. Middle English iris, a precious stone; = French iris = Spanish Portuguese iris = Italian iride, from Latin iris, from Greek ἰρις, the rainbow (Ἰρις, Latin Iris, the goddess of the rainbow), the iris of the eye, a kind of lily.
 

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/ˈaɪrɪs/
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