D defs.my
Entry 2 senses Webster, 1913

noninterchangeable

· IPA
01 adj. not able to be interchanged without changing the truth value.
  1. 1.
    not able to be interchanged without changing the truth value.(math, logic)
  2. 2.
    Not able to be substituted for each other; -- of objects, such as parts of machinery; as, the ink cartidges on the new printer are noninterchangeable with those on the older model.