| 单词 | cataract |
| 释义 | cataract n. 1. a a large waterfall or cascade. b a downpour; a rush of water. 2. Med. a condition in which the eye-lens becomes progressively opaque resulting in blurred vision. Etymology: L cataracta f. Gk katarrhaktes down-rushing; in med. sense prob. f. obs. sense 'portcullis' |
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