అర్థం : Plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals.

అర్థం : 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.

అర్థం : Diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening.