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cataract

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cataract


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Cataract  \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 
  break.] 
  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}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  cataract 
  n  1:  clouding  of  the  natural  lens  of  the  eye 
  2:  a  steep  descent  of  the  water  of  a  river  [syn:  {waterfall},  {falls}, 
  {cascade}] 




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