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 iris diaphragm)an adjustable diaphragm of thin overlapping plates for regulating the size of a central hole, especially for the admission of light to a lens 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
Genus Iris, family Iridaceae (the iris family): many species and numerous hybrids. The iris family also includes the gladioli, crocuses, and freesias 鸢尾属,鸢尾科:多种,有众多杂交种。鸢尾科还包括唐菖蒲属,番红花属和小菖兰属
verb
[no obj., with adverbial of direction](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)
语源
modern Latin, via Latin from Greek iris 'rainbow, iris'