n.
1.plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
2.muscular diaphragm that controls the size of the pupil
3.diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
Idiom of the Day
off the track
not concerned with the topic under discussion
My friend was off the track when he suggested that the problem was caused by someone else.
