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aggradation

 - 2 dictionary results

ag⋅grade

  [uh-greyd]
Use aggradation in a Sentence
–verb (used with object), -grad⋅ed, -grad⋅ing. Physical Geography.
to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like.
Compare degrade.

Origin:
1895–1900; ag- + grade

Related forms:
ag⋅gra⋅da⋅tion  [ag-ruh-dey-shuhn] , noun
ag⋅gra⋅da⋅tion⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To aggradation
ag·grade   (ə-grād')   
tr.v.   ag·grad·ed, ag·grad·ing, ag·grades
To fill and raise the level of (the bed of a stream) by deposition of sediment.
ag'gra·da'tion (āg'rə-dā'shən) n., ag'gra·da'tion·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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