a flat, coloured, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center
虹膜。
(亦作
虹彩光圈，可变光圈。
a plant with showy flowers, typically of purple or yellow, and sword-shaped leaves. They are native to both Eurasia and North America and widely cultivated as ornamentals.
鸢尾，鸢尾属植物。
(of an aperture, typically that of a lens)open or close in the manner of an iris or iris diaphragm
（镜头光圈）运用虹彩光圈渐显（或渐隐）。
【希腊神话】 彩虹女神（诸神的信使）。
"modern Latin, via Latin from Greek
