The colored ring of the eye surrounding the pupil

• A contractile membrane that controls how much light enters

眼睛中环绕瞳孔的有色环

• 控制入眼光量的可收缩膜

A plant of the genus Iris

• A showy garden flower with sword-like leaves

鸢尾属的植物

• 具有剑形叶片的观赏花卉

An adjustable diaphragm that controls a lens aperture

• A constricted opening in a waveguide forming a resonator
• The inner circle of an oscillated color spot

控制镜头光圈的可调节光阑

• 波导中用于形成谐振器的缩窄开口
• 振荡彩色斑点的内圈

A rainbow or display of iridescent colors

彩虹或虹彩般的色泽表现

To open or close like an iris diaphragm

• To make or become iridescent

像虹膜式光阑那样开合

• 使呈现虹彩；使发出虹色光

The plural of IRI

• May refer to Internationalized Resource Identifiers
• May refer to international roughness indices
• May refer to Interpersonal Reactivity Index scores

IRI 的复数形式

• 可指国际化资源标识符
• 可指国际粗糙度指数
• 可指人际反应性指数