ice that is covered with ice particles skinned off the surface by the players' skates, the effect being to impede movement thus slowing down the game.
- Slow ice also refers to ice that is not frozen as hard as it might be as a result of defective freezing apparatus or because the surroundings are at too high a temperature, as is often the case late in the spring.
- 1963  It was ruled that ice surfaces had to be re-flooded between periods to prevent "slow ice" from developing.