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fluctuation

[fluhk-choo-ey-shuh n] /ˌflʌk tʃuˈeɪ ʃən/
noun
1.
continual change from one point or condition to another.
2.
wavelike motion; undulation.
3.
Genetics. a body variation due to environmental factors and not inherited.
Origin of fluctuation
late Middle English
1400-1450
1400-50; late Middle English < Latin fluctuātiōn- (stem of fluctuātiō) a fluctuation, wavering. See fluctuate, -ion
Related forms
nonfluctuation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for fluctuation

fluctuation

/ˌflʌktjʊˈeɪʃən/
noun
1.
constant change; vacillation; instability
2.
undulation
3.
a variation in an animal or plant that is determined by environment rather than heredity
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 fluctuation
n.

mid-15c., from Middle French fluctuation (12c.) or directly from Latin fluctuationem (nominative fluctuatio) "a wavering, vacillation," noun of action from past participle stem of fluctuare "to undulate, to move in waves," from fluctus "wave, billow, surge," from past participle of fluere "to flow" (see fluent).

Online Etymology Dictionary, © 2010 Douglas Harper
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