Hyper Dictionary

English Dictionary Computer Dictionary Thesaurus Dream Dictionary Medical Dictionary

Search Dictionary:  

Meaning of CATARACT

Pronunciation:  'katu`rakt

WordNet Dictionary
  1. [n]  a large waterfall; violent rush of water over a precipice
  2. [n]  clouding of the natural lens of the eye
 See Also: eye disease, falls, waterfall



Webster's 1913 Dictionary
\Cat"a*ract\, n. [L. cataracta, catarracles, a
waterfall, Gr. ?, ?, fr. ? to break down; in the passive, to
fall or rush down (of tumors) to burst; kata` down + ? to
1. A great fall of water over a precipice; a large waterfall.

2. (Surg.) An opacity of the crystalline lens, or of its
   capsule, which prevents the passage of the rays of light
   and impairs or destroys the sight.

3. (Mach.) A kind of hydraulic brake for regulating the
   action of pumping engines and other machines; -- sometimes
   called {dashpot}.

Medical Dictionary
 Definition: A clouding or loss of transparency of the eye lens that impairs vision. There are many causes of cataracts including aging, diabetes, cortisone medication, trauma, or other diseases.
Biology Dictionary
 Definition: Clouding of the lens of the eye. In people with diabetes, this condition is sometimes referred to as "sugar cataract."
 Definition: opacity of the eye lens, often inherited as a dominant. The type may vary according to the action of a modifying gene.
Thesaurus Terms
 Related Terms: ablepsia, amaurosis, benightedness, blepharitis, blind side, blind spot, blindfolding, blinding, blindness, blurring the eyes, cascade, cataclysm, cecity, choroiditis, chute, collapse, come down, comedown, conjunctivitis, crash, cross-eye, darkness, debacle, declension, declination, defective vision, defluxion, deluge, depriving of sight, descend, descending, descension, descent, detached retina, dim-sightedness, dip down, down, downbend, downcome, downcurve, downfall, downflow, downgrade, downpour, downrush, downtrend, downturn, downward trend, drop, drop down, drop off, drop serene, dropping, economic blindness, engulf, esotropia, ever-during dark, excecation, eye defect, eyelessness, fall, fall down, fall off, falling, falls, flood, flooding, force, fresh, freshet, glaucoma, go down, go downhill, gravitate, gravitation, gutta serena, hoodwinking, inclination, inundate, inundation, iritis, keratitis, lack of vision, linn, lose altitude, making blind, nappe, Niagara, niphablepsia, optic neuritis, overbrim, overflow, overrun, overwhelm, parachute, partial blindness, pink eye, pitch, plummet, plummeting, plunge, pounce, pour, pour down, pour out, pour over, precipitate, psychic blindness, rain, rapids, reduced sight, retinoblastoma, river, run over, sault, sightless eyes, sightlessness, slop, slosh, snow blindness, soul-blindness, spate, spill, spill out, spill over, spiritual blindness, spout, stone-blindness, stoop, sty, submerge, swamp, sweep, swoop, torrent, total blindness, trachoma, trend downward, unenlightenment, unseeingness, uveitis, walleye, waterfall, waterflood, watershoot, whelm