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sectormore about sector


  2  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Sector  \Sec"tor\,  n.  [L.,  properly,  a  cutter,  fr  secare, 
  sectum,  to  cut:  cf  F.  secteur.  See  {Section}.] 
  1.  (Geom.)  A  part  of  a  circle  comprehended  between  two  radii 
  and  the  included  arc. 
  2.  A  mathematical  instrument,  consisting  of  two  rulers 
  connected  at  one  end  by  a  joint,  each  arm  marked  with 
  several  scales,  as  of  equal  parts  chords,  sines, 
  tangents,  etc.,  one  scale  of  each  kind  on  each  arm,  and 
  all  on  lines  radiating  from  the  common  center  of  motion. 
  The  sector  is  used  for  plotting,  etc.,  to  any  scale. 
  3.  An  astronomical  instrument,  the  limb  of  which  embraces  a 
  small  portion  only  of  a  circle,  used  for  measuring 
  differences  of  declination  too  great  for  the  compass  of  a 
  micrometer.  When  it  is  used  for  measuring  zenith  distances 
  of  stars,  it  is  called  a  zenith  sector. 
  {Dip  sector},  an  instrument  used  for  measuring  the  dip  of  the 
  {Sector  of  a  sphere},  or  {Spherical  sector},  the  solid 
  generated  by  the  revolution  of  the  sector  of  a  circle 
  about  one  of  its  radii,  or  more  rarely,  about  any 
  straight  line  drawn  in  the  plane  of  the  sector  through  its 
  From  WordNet  r  1.6  [wn]: 
  n  1:  a  plane  figure  bounded  by  two  radii  and  the  included  arc  of 
  a  circle 
  2:  a  body  of  people  who  form  part  of  society  or  economy;  "the 
  public  sector" 
  3:  a  particular  aspect  of  life  or  activity;  "he  was  helpless  in 
  an  important  sector  of  his  life"  [syn:  {sphere}] 
  4:  the  minimum  track  length  that  can  be  assigned  to  store 
  information;  unless  otherwise  specified  a  sector  of  data 
  consists  of  512  bytes 
  5:  a  portion  of  a  military  position 
  6:  two  graduated  arms  hinged  at  one  end 

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