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microscopemore about microscope


  3  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Microscope  \Mi"cro*scope\,  n.  [Micro-  +  -scope.] 
  An  optical  instrument,  consisting  of  a  lens,  or  combination 
  of  lenses,  for  making  an  enlarged  image  of  an  object  which  is 
  too  minute  to  be  viewed  by  the  naked  eye. 
  {Compound  microscope},  an  instrument  consisting  of  a 
  combination  of  lenses  such  that  the  image  formed  by  the 
  lens  or  set  of  lenses  nearest  the  object  (called  the 
  objective)  is  magnified  by  another  lens  called  the  ocular 
  or  eyepiece. 
  {Oxyhydrogen  microscope},  and  {Solar  microscope}.  See  under 
  {Oxyhydrogen},  and  {Solar}. 
  {Simple,  or  Single},  {microscope},  a  single  convex  lens  used 
  to  magnify  objects  placed  in  its  focus. 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Achromatic  \Ach`ro*mat"ic\,  a.  [Gr.  ?  colorless;  'a  priv.  +  ?, 
  ?,  color:  cf  F.  achromatique.] 
  1.  (Opt.)  Free  from  color;  transmitting  light  without 
  decomposing  it  into  its  primary  colors. 
  2.  (Biol.)  Uncolored;  not  absorbing  color  from  a  fluid;  -- 
  said  of  tissue. 
  {Achromatic  lens}  (Opt.),  a  lens  composed  usually  of  two 
  separate  lenses,  a  convex  and  concave,  of  substances 
  having  different  refractive  and  dispersive  powers,  as 
  crown  and  flint  glass,  with  the  curvatures  so  adjusted 
  that  the  chromatic  aberration  produced  by  the  one  is 
  corrected  by  other  and  light  emerges  from  the  compound 
  lens  undecomposed. 
  {Achromatic  prism}.  See  {Prism}. 
  {Achromatic  telescope},  or  {microscope},  one  in  which  the 
  chromatic  aberration  is  corrected,  usually  by  means  of  a 
  compound  or  achromatic  object  glass,  and  which  gives 
  images  free  from  extraneous  color. 
  From  WordNet  r  1.6  [wn]: 
  n  :  an  instrument  that  magnifies  the  image  of  small  objects 

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