break-off

That which breaks off, or is broken off

Stable glacier advance and retreat Advancing glaciers may inundate land, override installations (e.g., hydropower installations), dam rivers and form lakes, cause ice break-offs when the glacier advances over a cliff, etc.

A break, discontinuance, or interruption

All break-offs occur due to the deadline being reached or an occasional agent crash on a big domain.

The first shot in a game of snooker or other cue-game

Nonstandard form of break off (“to play the first shot in a frame of snooker, billiards or pool”).