non-interchangeable

interchangeable

[in-ter-cheyn-juh-buhl]
adjective
1.
(of two things) capable of being put or used in the place of each other: interchangeable symbols.
2.
(of one thing) capable of replacing or changing places with something else: an interchangeable part.

Origin:
1400–50; interchange + -able; replacing late Middle English entrechaungeable < Middle French entrechangeable

interchangeability, interchangeableness, noun
interchangeably, adverb
noninterchangeability, noun
noninterchangeable, adjective
noninterchangeableness, noun
noninterchangeably, adverb
uninterchangeable, adjective


2. See exchangeable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
interchangeable

adjective
1. (mathematics, logic) such that the arguments or roles can be interchanged; "the arguments of the symmetric relation, 'is a sister of,' are interchangeable" 
2. capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability; "interchangeable electric outlets" "interchangeable parts" [syn: exchangeable
WordNet® 3.0, © 2006 by Princeton University.
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