### Reciprocal

**RECIP'ROCAL**, *adjective* [Latin reciprocus.]

**1.** Acting in vicissitude or return; alternate.

Corruption is *reciprocal* to generation.

**2.** Mutual; done by each to the other; as *reciprocal* love; *reciprocal* benefits or favors; *reciprocal* duties; *reciprocal* aid.

**3.** Mutually interchangeable.

These two rules will render a definition *reciprocal* with the thing defined.

Reciprocal terms, in logic, those terms that have the same signification, and consequently are convertible and may be used for each other.

Reciprocal quantities, in mathematics, are those which, multiplied together, produce unity.

Reciprocal figures, in geometry, are those which have the antecedents and consequents of the same ratio in both figures.

Reciprocal ratio, is the ratio between the reciprocals of two quantities; as, the *reciprocal* ratio of 4 to 9, is that of 1/4 to 1/9.

**RECIP'ROCAL**, *noun* The *reciprocal* of any quantity, is unity divided by that quantity. Thus the *reciprocal* of 4 is 1/4.