Reciprocation may refer to:
  • Reciprocating motion
    Reciprocating motion
    Reciprocating motion, also called reciprocation, is a repetitive up-and-down or back-and-forth motion. It is found in a wide range of mechanisms, including reciprocating engines and pumps. The two opposite motions that comprise a single reciprocation cycle are called strokes...

    , 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
    Pole and polar
    In geometry, the terms pole and polar are used to describe a point and a line that have a unique reciprocal relationship with respect to a given conic section...

    line and each line in the plane into its pole
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