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acceleration

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acceleration


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Acceleration  \Ac*cel`er*a"tion\,  n.  [L.  acceleratio:  cf  F. 
  acc['e]l['e]ration.] 
  The  act  of  accelerating,  or  the  state  of  being  accelerated; 
  increase  of  motion  or  action  as  a  falling  body  moves  toward 
  the  earth  with  an  acceleration  of  velocity;  --  opposed  to 
  {retardation}. 
 
  A  period  of  social  improvement,  or  of  intellectual 
  advancement,  contains  within  itself  a  principle  of 
  acceleration.  --I.  Taylor. 
  (Astr.  &  Physics.) 
 
  {Acceleration  of  the  moon},  the  increase  of  the  moon's  mean 
  motion  in  its  orbit,  in  consequence  of  which  its  period  of 
  revolution  is  now  shorter  than  in  ancient  times. 
 
  {Acceleration}  and  {retardation  of  the  tides}.  See  {Priming 
  of  the  tides},  under  {Priming}. 
 
  {Diurnal  acceleration  of  the  fixed  stars},  the  amount  by 
  which  their  apparent  diurnal  motion  exceeds  that  of  the 
  sun,  in  consequence  of  which  they  daily  come  to  the 
  meridian  of  any  place  about  three  minutes  fifty-six 
  seconds  of  solar  time  earlier  than  on  the  day  preceding. 
 
 
  {Acceleration  of  the  planets},  the  increasing  velocity  of 
  their  motion,  in  proceeding  from  the  apogee  to  the  perigee 
  of  their  orbits. 
 
  From  WordNet  r  1.6  [wn]: 
 
  acceleration 
  n  1:  increase  in  velocity  [ant:  {deceleration}] 
  2:  the  act  of  accelerating;  increasing  the  speed  [syn:  {quickening}, 
  {speedup}] 
  3:  (physics)  a  rate  of  change  of  velocity 




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