Progradation
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 The growth of a river delta farther out into the sea over time, as it gains more sediment countable, uncountable
Etymology
Formed as pro- + gradation, after prograde.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.