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cataract

美音:[´kætərækts ]点这儿播放单词美音发声
英音:[´kætərækts ]点这儿播放单词英音发声
n.大瀑布,奔流,白内障

难易程度:

cataract为短语/超纲词汇

词根

cata-=down,downwards,fully 变化型 cat-

近义词, 同义词

cataract


/'kætərækt; `kætə,rækt/
n
1 large steep waterfall (大而陡的)瀑布.
2 (medical 医)
(a) disease in which the lens of the eye becomes cloudy, causing partial or total blindness 白内障.
(b) area clouded in this way 白内障的晶状体
*an operation to remove cataracts 白内障(晶状体)摘除手术.

cataract


n[C]
[Date: 1400-1500; Language: Latin;Origin: cataracta 'waterfall, castle gate that drops from above', from Greek, from katarassein 'to strike down', from kata- ( CATACLYSM) + arassein 'to strike';]
[Sense: 1; Origin: because a cataract blocks sight like a gate coming down]
a medical condition that causes the lens of your eye to become white, so that you slowly lose your sight
literary a large waterfall
图例解释