Dictionary

cataract

noun cat·a·ract \ˈka-tə-ˌrakt\

medical : a condition in which a part of your eye (called the lens) becomes cloudy and you cannot see well

: a large waterfall

Full Definition of CATARACT

1
[Middle English, from Middle French or Medieval Latin; Middle French catharacte, from Medieval Latin cataracta, from Latin, portcullis] :  a clouding of the lens of the eye or of its surrounding transparent membrane that obstructs the passage of light
2
a obsolete :  waterspout
b :  waterfall; especially :  a large one over a precipice
c :  steep rapids in a river
d :  downpour, flood <cataracts of rain> <cataracts of information>
cat·a·rac·tous \ˌka-tə-ˈrak-təs\ adjective

Examples of CATARACT

  1. <the roaring cataract is one of the park's most majestic sights>
  2. <in spring the melting snows usually produce a cataract that inundates the valley>

Origin of CATARACT

Latin cataracta waterfall, portcullis, from Greek kataraktēs, from katarassein to dash down, from kata- + arassein to strike, dash
First Known Use: 14th century

Related to CATARACT

Synonyms
cascade, waterfall, fall(s)
Antonyms
drought (also drouth)

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale

cataract

noun cat·a·ract \ˈkat-ə-ˌrakt\   (Medical Dictionary)

Medical Definition of CATARACT

:  a clouding of the lens of the eye or its surrounding transparent membrane that obstructs the passage of light

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