what is a hazelnut
Definition: A hazelnut is a type of tree nut similar to a filbert. The word hazelnut is sometimes used interchangeably with the word filbert, and they are related, but the two grow on trees of different species.Moreover, there are certain types of hazelnuts that are actually hybrids of filberts and hazelnuts.ike filberts, hazelnuts can be eaten raw or roasted. Hazelnuts have a hard exterior shell, and the nuts themselves have an outer skin which can have a bitter flavor. This outer skin on the hazelnut can removed by blanching the nut. Also Known As: 1  Filbert.