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iris
1: rainbow2
[New Latin irid-, iris, from Greek]
a: the opaque contractile diaphragm perforated by the pupil and forming the colored portion of the eye
— see eye illustration b: iris diaphragm
; also : a similar device with a circular opening that can be varied in size3also plural iris
[New Latin Irid-, Iris, genus name, from Latin]
: any of a large genus (Iris of the family Iridaceae, the iris family) of perennial herbaceous plants with linear usually basal leaves and large showy flowers
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