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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Double  \Dou"ble\,  a.  [OE.  doble,  duble,  double,  OF  doble, 
  duble,  double,  F.  double,  fr  L.  duplus  fr  the  root  of  duo 
  two  and  perh.  that  of  plenus  full;  akin  to  Gr  ?  double.  See 
  {Two},  and  {Full},  and  cf  {Diploma},  {Duple}.] 
  1.  Twofold;  multiplied  by  two  increased  by  its  equivalent; 
  made  twice  as  large  or  as  much  etc 
  Let  a  double  portion  of  thy  spirit  be  upon  me  --  2 
  Kings  ii  9. 
  Darkness  and  tempest  make  a  double  night.  --Dryden. 
  2.  Being  in  pairs;  presenting  two  of  a  kind  or  two  in  a  set 
  together;  coupled. 
  [Let]  The  swan,  on  still  St  Mary's  lake,  Float 
  double,  swan  and  shadow.  --Wordsworth. 
  3.  Divided  into  two  acting  two  parts  one  openly  and  the 
  other  secretly;  equivocal;  deceitful;  insincere. 
  With  a  double  heart  do  they  speak.  --  Ps  xii.  2. 
  4.  (Bot.)  Having  the  petals  in  a  flower  considerably 
  increased  beyond  the  natural  number,  usually  as  the  result 
  of  cultivation  and  the  expense  of  the  stamens,  or  stamens 
  and  pistils.  The  white  water  lily  and  some  other  plants 
  have  their  blossoms  naturally  double. 
  Note:  Double  is  often  used  as  the  first  part  of  a  compound 
  word  generally  denoting  two  ways,  or  twice  the  number, 
  quantity,  force,  etc.,  twofold,  or  having  two 
  {Double  base},  or  {Double  bass}  (Mus.),  the  largest  and 
  lowest-toned  instrument  in  the  violin  form  the 
  contrabasso  or  violone. 
  {Double  convex}.  See  under  {Convex}. 
  {Double  counterpoint}  (Mus.),  that  species  of  counterpoint  or 
  composition,  in  which  two  of  the  parts  may  be  inverted,  by 
  setting  one  of  them  an  octave  higher  or  lower. 
  {Double  court}  (Lawn  Tennis),  a  court  laid  out  for  four 
  players,  two  on  each  side 
  {Double  dagger}  (Print.),  a  reference  mark  ([dag])  next  to 
  the  dagger  ([dagger])  in  order  a  diesis. 
  {Double  drum}  (Mus.),  a  large  drum  that  is  beaten  at  both 
  {Double  eagle},  a  gold  coin  of  the  United  States  having  the 
  value  of  20  dollars. 
  {Double  entry}.  See  under  {Bookkeeping}. 
  {Double  floor}  (Arch.),  a  floor  in  which  binding  joists 
  support  flooring  joists  above  and  ceiling  joists  below. 
  See  Illust.  of  Double-framed  floor. 
  {Double  flower}.  See  {Double},  a.,  4. 
  {Double-framed  floor}  (Arch.),  a  double  floor  having  girders 
  into  which  the  binding  joists  are  framed. 
  {Double  fugue}  (Mus.),  a  fugue  on  two  subjects. 
  {Double  letter}. 
  a  (Print.)  Two  letters  on  one  shank;  a  ligature. 
  b  A  mail  requiring  double  postage. 
  {Double  note}  (Mus.),  a  note  of  double  the  length  of  the 
  semibreve;  a  breve.  See  {Breve}. 
  {Double  octave}  (Mus.),  an  interval  composed  of  two  octaves, 
  or  fifteen  notes,  in  diatonic  progression;  a  fifteenth. 
  {Double  pica}.  See  under  {Pica}. 
  {Double  play}  (Baseball),  a  play  by  which  two  players  are  put 
  out  at  the  same  time. 
  {Double  plea}  (Law),  a  plea  alleging  several  matters  in 
  answer  to  the  declaration,  where  either  of  such  matters 
  alone  would  be  a  sufficient  bar  to  the  action  --Stephen. 
  {Double  point}  (Geom.),  a  point  of  a  curve  at  which  two 
  branches  cross  each  other  Conjugate  or  isolated  points  of 
  a  curve  are  called  double  points,  since  they  possess  most 
  of  the  properties  of  double  points  (see  {Conjugate}).  They 
  are  also  called  {acnodes},  and  those  points  where  the 
  branches  of  the  curve  really  cross  are  called  {crunodes}. 
  The  extremity  of  a  cusp  is  also  a  double  point. 
  {Double  quarrel}.  (Eccl.  Law)  See  {Duplex  querela},  under 
  {Double  refraction}.  (Opt.)  See  {Refraction}. 
  {Double  salt}.  (Chem.) 
  a  A  mixed  salt  of  any  polybasic  acid  which  has  been 
  saturated  by  different  bases  or  basic  radicals,  as  the 
  double  carbonate  of  sodium  and  potassium, 
  b  A  molecular  combination  of  two  distinct  salts,  as 
  common  alum,  which  consists  of  the  sulphate  of 
  aluminium,  and  the  sulphate  of  potassium  or  ammonium. 
  {Double  shuffle},  a  low  noisy  dance. 
  {Double  standard}  (Polit.  Econ.),  a  double  standard  of 
  monetary  values;  i.  e.,  a  gold  standard  and  a  silver 
  standard,  both  of  which  are  made  legal  tender. 
  {Double  star}  (Astron.),  two  stars  so  near  to  each  other  as 
  to  be  seen  separate  only  by  means  of  a  telescope.  Such 
  stars  may  be  only  optically  near  to  each  other  or  may  be 
  physically  connected  so  that  they  revolve  round  their 
  common  center  of  gravity,  and  in  the  latter  case  are 
  called  also  binary  stars. 
  {Double  time}  (Mil.).  Same  as  {Double-quick}. 
  {Double  window},  a  window  having  two  sets  of  glazed  sashes 
  with  an  air  space  between  them