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alternation

[awl-ter-ney-shuh n, al-] /ˌɔl tərˈneɪ ʃən, ˌæl-/
noun
1.
the act or process of alternating or the state of being alternated.
2.
alternate succession; repeated rotation:
the alternation of the seasons.
3.
Electricity. a single fluctuation in the absolute value of an alternating current or voltage from zero to a maximum and back to zero, being equal to one half cycle.
4.
Linguistics. variation in the form of a linguistic unit as it occurs in different environments or under different conditions, as between the -ed and -en forms of the past participle in danced and spoken or between the (t) and (d) pronunciations of the past tense suffix -ed in hopped and rubbed.
Origin
1605-1615
1605-15; < Late Latin alternātiōn- (stem of alternātiō). See alternate, -ion
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for alternations
  • He was willing to make subtle alternations to topography for artistic effect.
British Dictionary definitions for alternations

alternation

/ˌɔːltəˈneɪʃən/
noun
1.
successive change from one condition or action to another and back again repeatedly
2.
(logic) another name for disjunction (sense 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for alternations

alternation

n.

mid-15c., from Old French alternacion, from Latin alternationem (nominative alternatio), noun of action from past participle stem of alternare (see alternate (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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alternations in Medicine

alternation al·ter·na·tion (ôl'tər-nā'shən, āl'-)
n.
Successive change from one thing or state to another and back again.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Difficulty index for alternation

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Word Value for alternations

12
15
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