Pronunciation: (kat'u-rakt"), [key]
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.
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.