Planation

/pleɪˈneɪʃən/ noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The formation of a flat surface by erosion and deposition countable, uncountable
  2. 2
    the process of erosion whereby a level surface is produced wordnet
  3. 3
    The morphological transformation of a three-dimensional structure into a two-dimensional one through development or evolution countable, uncountable

Etymology

From plane + -ation.

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