| 单词 | cataract |
| 释义 | cataract —cataractal, cataractous, adj. —cataracted, adj. /kat"euh rakt'/, n. 1. a descent of water over a steep surface; a waterfall, esp. one of considerable size. 2. any furious rush or downpour of water; deluge. 3. Ophthalm. a. an abnormality of the eye, characterized by opacity of the lens. b. the opaque area. [1350-1400; ME cataracte < L catar(r)acta < Gk katarráktes waterfall, floodgate, portcullis (n.), downrushing (adj.), akin to katarássein to dash down, equiv. to kat- CATA- + arássein to smite] |
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