Ice-shelf meaning

A body of glacial ice that extends out from a coastline and that floats, at least in part, rather than resting on the sea floor.
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A thick mass of glacial ice extending along a polar shore, often resting on the bottom near the shore with the seaward edge afloat: it may protrude hundreds of miles out to sea.
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A thick, floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. Ice shelves are found in Antarctica, Greenland, and Canada only.
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