- The definition of a cataract is a flood, waterfall or rush of water, or an eye disease when the lens becomes opaque, causing partial or total blindness.
- An example of a cataract is Niagara Falls.
- An example of a cataract is an eye problem where the lens in an older person's eye gets cloudy causing vision issues.
A cataract is a large waterfall.
cataract definition by Webster's New World
- a large waterfall
- any strong flood or rush of water; deluge
- an eye disease in which the crystalline lens or its capsule becomes opaque, causing partial or total blindness
- the opaque area
Origin: Middle English cataracte, floodgate (of heaven), cataract (of the eye) ; from Classical Latin cataracta, a waterfall, portcullis ; from Classical Greek katarhaktēs ; from katarhassein, to dash down ; from kata-, down plush rhassein, to strike or uncertain or unknown; perhaps arassein, to smite
cataract definition by American Heritage Dictionary
- A large or high waterfall.
- A great downpour; a deluge.
- Pathology Opacity of the lens or capsule of the eye, causing impairment of vision or blindness.
Origin: Middle English cataracte, from Old French, from Latin cataracta, from Greek katarraktēs, kataraktēs, downrush, waterfall, portcullis, probably from katarassein, to dash down (kat-, kata-, cata- + arassein, to strike). Sense 3, from a comparison to a portcullis or other falling impediment or covering.
- catˌa·racˈtous adjective
cataract - Cultural Definition
A loss in the transparency of the lens of the eye, which reduces a person's ability to see. The condition can be treated by surgically removing the lens and replacing it with an artificial one, or with corrective eyeglasses or contact lenses.
cataract - Medical Definition
- cataractous adjective
location in the lens of different types of cataracts
cataract - Science Definition
- An opacity of the lens of the eye or the membrane that covers it, causing impairment of vision or blindness.
- A waterfall in which a large volume of water flows over a steep precipice.