资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.

Fuze \Fuze\, n.
   A tube, filled with combustible matter, for exploding a
   shell, etc. See {Fuse}, n.

   {Chemical fuze}, a fuze in which substances separated until
      required for action are then brought into contact, and
      uniting chemically, produce explosion.

   {Concussion fuze}, a fuze ignited by the striking of the
      projectile.

   {Electric fuze}, a fuze which is ignited by heat or a spark
      produced by an electric current.

   {Friction fuze}, a fuze which is ignited by the heat evolved
      by friction.

   {Percussion fuze}, a fuze in which the ignition is produced
      by a blow on some fulminating compound.

   {Time fuze}, a fuze adapted, either by its length or by the
      character of its composition, to burn a certain time
      before producing an explosion.