DCHP-1 Online
rim-ice 
n. a shelf of ice anchored to the bank of a river otherwise open.
See also: ice-shelf (def. 2)
- 1902 (n.d.) Nor, though the water was open, did she find a clear way, for the river was full of scattered floes which had crumbled down from the rim-ice.
- 1928 The big freighting canoes had been launched into a basin cracked out of the rim ice and were being loaded for the voyage.
- 1902 (n.d.) Nor, though the water was open, did she find a clear way, for the river was full of scattered floes which had crumbled down from the rim-ice.