Logic. (of propositions, propositional forms, etc.) logically equivalent in any of various specified ways.
–noun
3.
an equivalent.
Origin: 1375–1425; late ME < L aequipollent- (s. of aequipollēns) of equal value, equiv. to aequi-equi-+ pollent- (s. of pollēns) able, prp. of pollēre to be strong
Equal in force, power, effectiveness, or significance.
Logic Validly derived from each other; deducible.
Equivalent.
n. An equivalent.
[Middle English, from Old French, from Latin aequipollēns, aequipollent- : aequi-, equi- + pollēns, present participle of pollēre, to be powerful.] e'qui·pol'lence n., e'qui·pol'lent·ly adv.