- an abnormality of the eye, characterized by opacity of the lens.
- the opaque area.
Origin of cataract
Examples from the Web for cataractous
Historical Examples of cataractous
No other eye disease and no prevalent constitutional diseases or degeneracies in the cataractous stock.
- partial or total opacity of the crystalline lens of the eye
- the opaque area
Word Origin for cataract
early 15c., "a waterfall, floodgate," from Latin cataracta "waterfall," from Greek katarhaktes "waterfall, broken water; a kind of portcullis," noun use of an adjective compound meaning "swooping, down-rushing," from kata "down" (see cata-). The second element is traced either to arhattein "to strike hard" (in which case the compound is kat-arrhattein), or to rhattein "to dash, break."
Its alternative sense in Latin of "portcullis" probably was passed through French to form the English meaning "eye disease" (early 15c.), on the notion of "obstruction" (to eyesight).