Definition of nivation in US English:

nivation

noun

Geography
  • Erosion of the ground beneath and at the sides of a snow bank, mainly as a result of alternate freezing and thawing.

    • ‘A common feature created by nivation is a nivation hollow.’
    • ‘Modification of snow cover by climatic change or ‘snow farming’ at ski resorts should have negligible effects on nivation and landforms.’
    • ‘In this manner the depression is enlarged and deepened by the same process of nivation that inaugurated it.’

Origin

Early 20th century: from Latin nix, niv- ‘snow’ + -ation.

Pronunciation

nivation

/ˌnaɪˈveɪʃ(ə)n//ˌnīˈvāSH(ə)n/