Definition of altiplanation in English:

altiplanation

Pronunciation /altɪpləˈneɪʃn/

noun

Geology
  • Levelling of the ground as a result of alternate freezing and thawing of soil or rock; = cryoplanation . Usually attributive, especially in "altiplanation terrace".

Origin

Early 20th century. From alti- + planation.