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gradation

[grey-dey-shuh n] /greɪˈdeɪ ʃən/
noun
1.
any process or change taking place through a series of stages, by degrees, or in a gradual manner.
2.
a stage, degree, or grade in such a series.
3.
the passing of one tint or shade of color to another, or one surface to another, by very small degrees, as in painting or sculpture.
4.
the act of grading.
5.
6.
Geology. the leveling of a land surface, resulting from the concerted action of erosion and deposition.
Origin
1530-1540
1530-40; < Latin gradātiōn- (stem of gradātiō). See grade, -ation
Related forms
gradational, adjective
gradationally, adverb
regradation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for gradation
  • The only illusion, if it could be called that, comes from the fact that there is a gradation.
  • There tends to be a gradation of these water sorted granules.
  • Within this narrow space, there is also a decided gradation of holiday tempo.
  • Tiny dye clouds form layers on the finished negative that reproduce with exceptional sharpness and gradation.
  • Certifiers have an intent to keep their standards high, but there is a gradation of standards.
  • The standard gradation can result in a gap-graded aggregate whereas the combined gradation produces a more uniform gradation.
  • Each gradation in the table is identified by number.
  • These gradation requirements apply regardless of the type of filter design used.
  • For each mix design, gradation and size requirements are checked.
  • Often, aggregate from more than one source is required to meet gradation requirements.
British Dictionary definitions for gradation

gradation

/ɡrəˈdeɪʃən/
noun
1.
a series of systematic stages; gradual progression
2.
(often pl) a stage or degree in such a series or progression
3.
the act or process of arranging or forming in stages, grades, etc, or of progressing evenly
4.
(in painting, drawing, or sculpture) transition from one colour, tone, or surface to another through a series of very slight changes
5.
(linguistics) any change in the quality or length of a vowel within a word indicating certain distinctions, such as inflectional or tense differentiations See ablaut
6.
(geology) the natural levelling of land as a result of the building up or wearing down of pre-existing formations
Derived Forms
gradational, adjective
gradationally, adverb
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 gradation
n.

1530s, "climax," from Middle French gradation (16c.) and directly from Latin gradationem (nominative gradatio) "ascent by steps, a climax," noun of action from gradus "step, degree" (see grade). Meaning "gradual change" is from 1540s. Related: Gradational.

Online Etymology Dictionary, © 2010 Douglas Harper
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gradation in Science
gradation
  (grā-dā'shən)   
  1. The process by which land is leveled off through erosion or the transportation or deposition of sediments, especially the process by which a riverbed is brought to a level where it is just able to transport the amount of sediment delivered to it.

  2. The proportion of particles (such as sand grains) of a given size within a sample of particulate material, such as soil or sandstone.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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