1. (

• iris ,
• flag ,
• fleur-de-lis ,
• sword_lily ,

) plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals ;

2. (

• iris

) 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. (

• iris ,
• iris_diaphragm

) diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening ;