Hazelnut (noun)

1. The edible nut of the hazel tree, typically encased in a woody shell that splits when ripe.
2. A tree or shrub that bears hazelnuts.

Origin:

Middle english haselhazelnut, from old english hæselhnutu.

Examples:

1. I love eating hazelnuts, they have a unique taste.
2. Hazelnuts are a common ingredient in chocolate truffles.
3. The hazelnut tree is a small, deciduous tree that produces edible nuts.
4. The hazelnut is known for its smooth, buttery flavor.
5. The hazelnut orchards were full of ripe nuts.