Dictionary![]() ![]() cat•a•ractPronunciation: (kat'u-rakt"), [key] —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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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