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parabolicmore about parabolic

parabolic

 

  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Parabolic  \Par`a*bol"ic\,  Parabolical  \Par`a*bol"ic*al\,  a.  [Gr. 
  paraboliko`s  figurative:  cf  F.  parabolique  See  {Parable}.] 
  1.  Of  the  nature  of  a  parable;  expressed  by  a  parable  or 
  figure;  allegorical;  as  parabolical  instruction. 
 
  2.  [From  {Parabola}.]  (Geom.) 
  a  Having  the  form  or  nature  of  a  parabola;  pertaining 
  to  or  resembling,  a  parabola;  as  a  parabolic  curve. 
  b  Generated  by  the  revolution  of  a  parabola,  or  by  a 
  line  that  moves  on  a  parabola  as  a  directing  curve; 
  as  a  parabolic  conoid. 
 
  {Parabolic  conoid},  a  paraboloid;  a  conoid  whose  directing 
  curve  is  a  parabola.  See  {Conoid}. 
 
  {Parabolic  mirror}  (Opt.),  a  mirror  having  a  paraboloidal 
  surface  which  gives  for  parallel  rays  (as  those  from  very 
  distant  objects)  images  free  from  aberration.  It  is  used 
  in  reflecting  telescopes. 
 
  {Parabolic  spindle},  the  solid  generated  by  revolving  the 
  portion  of  a  parabola  cut  off  by  a  line  drawn  at  right 
  angles  to  the  axis  of  the  curve,  about  that  line  as  an 
  axis. 
 
  {Parabolic  spiral},  a  spiral  curve  conceived  to  be  formed  by 
  the  periphery  of  a  semiparabola  when  its  axis  is  wrapped 
  about  a  circle;  also  any  other  spiral  curve  having  an 
  analogy  to  the  parabola. 
 
  From  WordNet  r  1.6  [wn]: 
 
  parabolic 
  adj  1:  resembling  or  expressed  by  parables  [syn:  {parabolical}] 
  2:  having  the  form  of  a  parabola  [syn:  {parabolical}]




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