(′īs ′shelf)
(oceanography) A thick sheet of ice with a fairly level or undulating surface, formed along a polar coast and in shallow bays and inlets, fastened to the shore along one side but mostly afloat and nourished by annual accumulation of snow and by the seaward extension of land glaciers.
(īs’bûrg)
(1)A large mass of glacial ice broken off and drifted from parent glaciers or ice shelves along polar seas. Only about 10 percent of its mass is above the surface of the water.
(2)Informal. A cold, aloof person.