The action in which a body's displacement returns to its starting location in a given time repeatedly in a rotary axis but without traversing a full rotation, i.e. back and forth not round and round. The velocity over which the displacement occurs with each repetition not necessarily being constant. Such an action is usually used to describe quickly moving implements in mechanical objects within a rotary axis, or even in complex rotary displacement/velocity paths.

See Also:

• Reciprocation
  Reciprocation
  Reciprocation may refer to:* Reciprocating motion, a type of oscillatory motion, as in the action of a reciprocating saw* Reciprocation in geometry, an operation with circles that involves transforming each point in plane into its polar line and each line in the plane into its pole...
  
  
• Oscillation
  Oscillation
  Oscillation is the repetitive variation, typically in time, of some measure about a central value or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes...
  
  
• Oscillating reciprocation
  Oscillating reciprocation
  Oscillating reciprocation is an action where a body's displacement 'reciprocates' in a given axis or defined displacement vector and 'oscillates' along that axis usually perpendicular to the defined displacement. eg. the new Sabre Saw's on the market are reciprocating saw's which also oscillate the...
  
  
• Reciprocating oscillation
  Reciprocating oscillation
  Reciprocating oscillation is an action of oscillation where the oscillation vector varies its amplitude, frequency and or displacement reciprocally....