reciprocation

1. An alternating back-and-forth movement.
2. The act or fact of reciprocating; interchange.

noun

The act of retaliating: counteraction, counterattack, counterblow, reprisal, requital, retaliation, retribution, revenge, tit for tat, vengeance. Idioms: an eye for an eye, a tooth for a tooth, like for like, measure for measure. See attack/defend, forgiveness/vindictiveness.

The means by which one part of a removable partial denture framework is made to counter the effect created by another part of the framework.