nival definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
of, or growing in or under, snow
Origin: Classical Latin nivalis ; from nix (gen. nivis), snow)
nival definition by American Heritage Dictionary
Of, relating to, or growing in or under snow: nival species of plants.
Origin: Latin nivālis, from nix, niv-, snow; see sneigwh- in Indo-European roots.