Iris - Definition
iris
n 1: plants with sword-shaped leaves and erect stalks bearing
bright-colored flowers composed of three petals and three
drooping sepals [syn: iris, flag, fleur-de-lis,
sword lily]
2: 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
3: diaphragm consisting of thin overlapping plates that can be
adjusted to change the diameter of a central opening [syn:
iris, iris diaphragm]