aggradation


ag·gra·da·tion

noun \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

Origin of AGGRADATION

ad- + gradation
First Known Use: 1898

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