Commutations'

commutation

[kom-yuh-tey-shuhn]
noun
1.
the act of substituting one thing for another; substitution; exchange.
2.
the changing of a prison sentence or other penalty to another less severe.
3.
the act of commuting, as to and from a place of work.
4.
the substitution of one kind of payment for another.
5.
Electricity. the act or process of commutating.
6.
Also called commutation test. Linguistics. the technique, especially in phonological analysis, of substituting one linguistic item for another while keeping the surrounding elements constant, used as a means of determining the constituent units in a sequence and their contrasts with other units.

Origin:
1400–50; late Middle English commutacioun < Latin commūtātiōn- (stem of commutātiō) change. See commute, -ation

procommutation, adjective
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World English Dictionary
commutation (ˌkɒmjʊˈteɪʃən)
 
n
1.  a substitution or exchange
2.  a.  the replacement of one method of payment by another
 b.  the payment substituted
3.  the reduction in severity of a penalty imposed by law
4.  the process of commutating an electric current
5.  (US) the travelling done by a commuter

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

commutation
1496, from Fr. commutacion (13c.), from L. commutationem (nom. commutatio) "a change, alteration," noun of action from commutare "to change, alter entirely" (see commute).
Online Etymology Dictionary, © 2010 Douglas Harper
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