percussion
n
1 the act, an instance, or an effect of percussing
2 (Music) the family of instruments in which sound arises from the striking of materials with sticks or hammers
a instruments of this family constituting a section of an orchestra, band, etc.
b (as modifier)
a percussion ensemble
4 (Med) the act of percussing a body surface
5 the act of exploding a percussion cap (C16: from Latin percussio, from percutere to hit; see percuss)
percussion cap
n a detonator consisting of a paper or thin metal cap containing material that explodes when struck and formerly used in certain firearms
percussion instrument
n any of various musical instruments that produce a sound when their resonating surfaces are struck directly, as with a stick or mallet, or by leverage action. They may be of definite pitch (as a kettledrum or xylophone), indefinite pitch (as a gong or rattle), or a mixture of both (as various drums)
percussion lock
n a gunlock in which the hammer strikes a percussion cap
percussion tool
n a power driven tool which operates by striking rapid blows: the power may be electricity or compressed air