1. [ noun ] (botany,anatomy,zoology) muscular diaphragm that controls the size of the pupil; it forms the colored portion of the eye
Related terms: membrane eye pupil
2. [ noun ] (botany) plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
Synonyms: flag sword_lily fleur-de-lis
Related terms: iridaceous_plant beardless_iris Persian_iris bulbous_iris dwarf_iris stinking_iris bearded_iris yellow_iris dwarf_iris blue_flag southern_blue_flag English_iris genus_Iris
3. [ noun ] Woman's first name, popularity rank in the U.S. is 325
4. [ noun ] (photography) diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
Synonyms: iris_diaphragm
Related terms: diaphragm
Similar spelling:   Irish