interchangeable

Meanings

1. 1
   adj

   (mathematics, logic) such that the arguments or roles can be interchanged

   The arguments of the symmetric relation, `is a sister of,' are interchangeable.

2. 2
   adj

   Freely substitutable; that may be swapped at will.

   Eli Whitney's development of interchangeable parts was a breakthrough for modern manufacturing. Prior to that, each part had to be made custom.

From interchange + -able.

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