E'qui-pŏl'lence or E'qui-pŏl'len-cy, n.

n. [Fr. équipollence, It. equi-pollenza, Sp. equipolencia, from Lat. æquipollens. See infra.]

1. Equality of power, force, signification, or application. Boyle.
2. (Logic.) An equivalence between two or more propositions.