Pronunciation: (ri-sip'ru-kul),[key] —adj. 1. given or felt by each toward the other; mutual: reciprocal respect. 2. given, performed, felt, etc., in return: reciprocal aid. 3. corresponding; matching; complementary; equivalent: reciprocal privileges at other health clubs. 4. Gram.(of a pronoun or verb) expressing mutual relationship or action: “Each other” and “one another” are reciprocal pronouns. 5. inversely related or proportional; opposite.
6. Math.noting expressions, relations, etc., involving reciprocals: a reciprocal function. 7. Navig.bearing in a direction 180° to a given direction; back.
—n. 1. something that is reciprocal to something else; equivalent; counterpart; complement.
2. Also called multiplication inverse.Math.the ratio of unity to a given quantity or expression; that by which the given quantity or expression is multiplied to produce unity: The reciprocal of x is 1/x.