(n.) An immense field or stream of ice formed a the region of perpetual snow\, and moving slowly down a mountain slope or valley, as in the Alps, or over an extended area, as in Greenland.

Dry Ice berg calf cryosphere firn floe frazil frozen water glaciation glacieret glaze glazed frost granular snow ground ice growler ice ice banner ice barrier ice belt ice cave ice cubes ice dike ice field ice floe ice foot ice front ice island ice needle ice pack ice pinnacle ice raft ice sheet iceberg icefall icequake icicle jokul lolly neve nieve penitente pack ice serac shelf ice sleet slob sludge snow ice snowberg