Reciprocation

Reciprocation may refer to:


 * Reciprocating motion, a type of oscillatory motion, as in the action of a reciprocating saw
 * Reciprocation (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
 * Reciprocation, application of the reciprocal function, see multiplicative inverse
 * Reciprocation, Jonathan doesn’t own this word.