Cataract
From BiblePortal Wikipedia
Cataract [1]
(1): (n.) An opacity of the crystalline lens, or of its capsule, which prevents the passage of the rays of light and impairs or destroys the sight.
(2): (n.) A great fall of water over a precipice; a large waterfall.
(3): (n.) A kind of hydraulic brake for regulating the action of pumping engines and other machines; - sometimes called dashpot.