A split, coned sleeve to hold small, circular tools or work in the nose of a lathe or other type of machine.

1. The glass neck remaining on a bottle after it is taken off the glass-blowing iron.

2. Pieces of glass, ordinarily discarded, that are added to a batch of glass. Also spelled cullet.

A small, friction-tight collar on a balance staff which holds the inner end of a balance spring.

The small, horizontal face at the bottom of a brilliant-cut gemstone.