pack ice

pack ice (usually uncountable, plural pack ices)

1. A large consolidated mass of floating sea ice.
   • 1940 May, “Overseas Railways: Icebound Denmark”, in Railway Magazine, page 302:

     Pack ice, at times mounting to a height of 35 ft., snow, fog, and floating mines all played their part in the disorganisation of railway services, and most of the train ferry services were completely suspended for a month or more; [...].

   • 1986, Stephen Pyne, The Ice, page 4:

     […] the sea ices: pack ices, ice floes, ice rinds, ice hummocks ...; the coastal ices, fast ice, shore ices, glacial-ice, tongues, ice piedmonts; […]

• ice pack
• hummocky ice

• ice pack, icepack