n plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
n 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
n diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
[植]鸢尾科植物, 彩虹