Sliver (noun)

A thin, narrow piece of wood, metal, or glass that has been split or cut off.

Origin:

Middle english: from old english slīfer, of germanic origin; related to slip.

Examples:

1. He cut his finger on a sliver of glass.
2. She removed a sliver of wood from her finger.
3. A sliver of light came in through the crack in the door.
4. The chef sliced the cheese into thin slivers.
5. A sliver of moon was visible in the sky.