1
- a flat, coloured, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center虹膜。
1.1
- （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。
2
- 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。
2.1
- 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。
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）。
词源
modern Latin, via Latin from Greek iris 'rainbow, iris'.