plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
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
diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
经典引文
His crest, that prouder than blue Iris bends.
出自：Troilus Cressida,Shakespeare
If Liberty Lent not life its soul of light, Hope its iris of delight.
