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commutative

com·mu·ta·tive

commutative

 
pronunciation:
k myu t tihv [or] kam y teI tihv
part of speech: adjective
definition 1: of or pertaining to substitution or exchange.
definition 2: in mathematics, interchangeable in order, as the terms in the equation, a + b = b + a.
derivation: commutativity (adj.)