DCHP-1 Online
shelf 
n. a shelf of ice anchored to the bank of a river otherwise open.
See also: ice-shelf (def. 2)
- 1933 Kay and Donald were going along one behind the other when a big section of the shelf they were on cracked off and started floating down the river.
- 1933 Kay and Donald were going along one behind the other when a big section of the shelf they were on cracked off and started floating down the river.