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percussionmore about percussion

percussion


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Percussion  \Per*cus"sion\,  n.  [L.  percussio:  cf  F.  percussion. 
  See  {Percuss}.] 
  1.  The  act  of  percussing,  or  striking  one  body  against 
  another;  forcible  collision,  esp.  such  as  gives  a  sound  or 
  report.  --Sir  I.  Newton. 
 
  2.  Hence:  The  effect  of  violent  collision;  vibratory  shock; 
  impression  of  sound  on  the  ear. 
 
  The  thunderlike  percussion  of  thy  sounds.  --Shak. 
 
  3.  (Med.)  The  act  of  tapping  or  striking  the  surface  of  the 
  body  in  order  to  learn  the  condition  of  the  parts  beneath 
  by  the  sound  emitted  or  the  sensation  imparted  to  the 
  fingers.  Percussion  is  said  to  be  immediate  if  the  blow  is 
  directly  upon  the  body;  if  some  interventing  substance,  as 
  a  pleximeter,  is  used  it  is  called  mediate. 
 
  {Center  of  percussion}.  See  under  {Center}. 
 
  {Percussion  bullet},  a  bullet  containing  a  substance  which  is 
  exploded  by  percussion;  an  explosive  bullet. 
 
  {Percussion  cap},  a  small  copper  cap  or  cup,  containing 
  fulminating  powder,  and  used  with  a  percussion  lock  to 
  explode  gunpowder. 
 
  {Percussion  fuze}.  See  under  {Fuze}. 
 
  {Percussion  lock},  the  lock  of  a  gun  that  is  fired  by 
  percussion  upon  fulminating  powder. 
 
  {Percussion  match},  a  match  which  ignites  by  percussion. 
 
  {Percussion  powder},  powder  so  composed  as  to  ignite  by 
  slight  percussion;  fulminating  powder. 
 
  {Percussion  sieve},  {Percussion  table},  a  machine  for  sorting 
  ores  by  agitation  in  running  water. 
 
  From  WordNet  r  1.6  [wn]: 
 
  percussion 
  n  1:  the  act  of  playing  drums;  "he  practiced  his  drumming  several 
  hours  every  day"  [syn:  {drumming}] 
  2:  the  act  of  exploding  a  percussion  cap 
  3:  tapping  a  part  of  the  body  for  diagnostic  purposes 




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