- A thick-shelled nut from the European or North American hazel tree, Corylus avellana, with an outer husk that does not completely cover the nut. The nuts are small (up to 1 cm) and pointed, with a firmly attached skin which is loosened by roasting or blanching. Grown in the UK, Italy and Spain, they have a distinctive flavour and are used in cooking, confectionery and as a dessert nut. The oil is prized for its flavour.
- noun a small round nut with a smooth shiny shell.