Xor: /X'or/, /kzor/ Conj. Exclusive Or. `A Xor B' Means `A Or B, But Not Both'.

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:xor: /X'or/, /kzor/ conj. Exclusive or. `A xor B' means
`A or B, but not both'. "I want to get cherry pie xor a
banana split." This derives from the technical use of the term as
a function on truth-values that is true if exactly one of its two
arguments is true.
-- The AI Hackers Dictionary