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Noun iris has 3 senses
  1. iris, flag, fleur-de-lis, sword lily - plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
    --1 is a kind of iridaceous plant
    --1 is a member of genus Iris
    --1 has particulars:
     bearded iris; beardless iris; bulbous iris; dwarf iris, Iris cristata; stinking iris, gladdon, gladdon iris, stinking gladwyn, roast beef plant, Iris foetidissima; Persian iris, Iris persica; yellow iris, yellow flag, yellow water flag, Iris pseudacorus; dwarf iris, vernal iris, Iris verna; blue flag, Iris versicolor; southern blue flag, Iris virginica; English iris, Iris xiphioides
  2. iris - muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye
    --2 is a kind of     membrane, tissue layer
    --2 is a part of eye, oculus, optic
    --2 has part: pupil
  3. iris, iris diaphragm - diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
    --3 is a kind of diaphragm, stop
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