cataract


cataract
cataract [kat′ə rakt΄]
n.
[ME cataracte, floodgate (of heaven), cataract (of the eye) < L cataracta, a waterfall, portcullis < Gr katarhaktēs < katarhassein, to dash down < kata-, down + rhassein, to strike or ? arassein, to smite]
1. a large waterfall
2. any strong flood or rush of water; deluge
3.
a) an eye disease in which the crystalline lens or its capsule becomes opaque, causing partial or total blindness
b) the opaque area

English World dictionary. . 2014.

Synonyms:
, , / , (from opacity of the crystalline lens)