biconditional

American  

[bahy-kuhn-dish-uh-nl] / ˌbaɪ kənˈdɪʃ ə nl /

adjective

Logic.

1. (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.”

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biconditional British  

/ ˌbaɪkənˈdɪʃənəl /

noun

1. another name for equivalence

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Etymology

Origin of biconditional

First recorded in 1935–40; bi- ¹ + conditional