nivationPronunciation: /nʌɪˈveɪʃ(ə)n/Definition of nivation noun [mass noun] Geography erosion of the ground beneath and at the sides of a snow bank, mainly as a result of alternate freezing and thawing. Origin: early 20th century: from Latin nix, niv- 'snow' + -ationnivation in other Oxford dictionaries Definition of nivation in the US English dictionary
