CATARACT
cataract
(noun) a large waterfall; violent rush of water over a precipice
cataract
(noun) an eye disease that involves the clouding or opacification of the natural lens of the eye
Source: WordNet® 3.1
Etymology
Noun
cataract (plural cataracts)
(obsolete) A waterspout
A large waterfall; steep rapids in a river.
A flood of water
An overwhelming downpour or rush
(pathology) a clouding of the lens in the eye leading to a decrease in vision.
Source: Wiktionary
Cat"a*ract, n. Etym: [L. cataracta, catarracles, a waterfall, Gr.
1. A great fall of water over a precipice; a large waterfall.
2. (Surg.)
Definition: 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.
3. (Mach.)
Definition: A kind of hydraulic brake for regulating the action of pumping
engines and other machines; -- sometimes called dashpot.
Source: Webster’s Unabridged Dictionary 1913 Edition