the relationship between two statements, each of which implies the other
b. Also called: biconditional
the binary truth-function that takes the value true when both component sentences are true or when both are false, corresponding to English if and only if. Symbol: ≡ or ↔, as in –(p ∧ q) ≡ –p ∨ –q
biconditional in American English
(ˌbaikənˈdɪʃənl)
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”
Word origin
[1935–40; bi-1 + conditional]This word is first recorded in the period 1935–40. Other words that entered Englishat around the same time include: aeroembolism, blitz, gangbuster, hard core, walk-throughbi- is a combining form meaning “twice,” “two,” used in the formation of compound words.Other words that use the affix bi- include: bilateral, bilingual, bipolar, bivalent, bivalve