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Definition of progradation - 1 dictionary result

pro⋅gra⋅da⋅tion

[proh-grey-dey-shuhn]
–noun Geology.
seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.

Origin:
1905–10; prograde ( pro- 1 + (retro)grade ) + -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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