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Variant of irido-.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n., pl. i•ris•es; esp. for 1,8 ir•i•des (ˈɪr ɪˌdiz, ˈaɪ rɪ-) for 2,3 i•ris; n.
1. the contractile, circular diaphragm forming the colored portion of the eye and containing an opening, the pupil, in its center.
2. any plant of the genus Iris, having flowers with three upright petals and three drooping, petallike sepals.
3. a flower of this plant.
4. (cap.) an ancient Greek goddess of the rainbow and messenger of the gods.
5. a rainbow.
[1350–1400; Middle English < Latin Īris, īris < Greek Îris, îris rainbow]
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