First Known Use: 1898
Dictionary
aggradation
noun ag·gra·da·tion \ˌa-grə-ˈdā-shən\
Definition of AGGRADATION
: a modification of the earth's surface in the direction of uniformity of grade by deposition
— ag·gra·da·tion·al \-shnəl, -shə-nəl\ adjective
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Origin of AGGRADATION
ad- + gradation
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