snowfield

/ˈsnoʊfild/
noun
  1. A large, permanent area of snow, especially on a mountain or in a polar region, that does not melt completely in summer.
    • Glaciers often form from snowfields that accumulate over many years.
    • The snowfield glistened brightly under the midday sun.
    • The hikers crossed a vast snowfield on their way to the summit.