Loose masses of ice on the surface of the ocean; pack ice through which a vessel can navigate.

plural of ice-shelf

Alternative form of ice shelf

plural of ice-saw

A large saw for cutting through ice to free ships, etc.

ice formed in the polar seas in large surfaces, distinguished from icebergs

Synonym of ice circle

Synonym of ice circle

A phenomenon that occurs on rivers during winter, where floating ice caught in an eddying flow will rotate around, knocking off its distant edges, forming a floating revolving circular disk, slowing turning under the influence of the underlying vortex current; when the temperature conditions are not too warm, leading to ice breakup and fragility, and not too cool, freezing over the entire surface.

plural of 3D IC