| 单词 | iris |
| 释义 | iris n. 1. the flat circular coloured membrane behind the cornea of the eye, with a circular opening (pupil) in the centre. 2. any herbaceous plant of the genus Iris, usu. with tuberous roots, sword-shaped leaves, and showy flowers. 3. (in full iris diaphragm) an adjustable diaphragm of thin overlapping plates for regulating the size of a central hole esp. for the admission of light to a lens. Etymology: ME f. L iris iridis f. Gk iris iridos rainbow, iris |
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