biconditional

biconditional

[bahy-kuhn-dish-uh-nl]
adjective Logic.
(of a proposition) asserting that the existence or occurrence of one thing or event depends on, and is dependent on, the existence or occurrence of another, as “A if and only if B.”

Origin:
1935–40; bi-1 + conditional

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World English Dictionary
biconditional (ˌbaɪkənˈdɪʃənəl)
 
n
another name for equivalence

Collins English Dictionary - Complete & Unabridged 10th Edition
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