Nuts are dried seeds or fruits of different species of trees which appear in the DreamWorks Dragons franchise.
The word nut may refer to a fruit with a hard shell and a seed (rarely two) or a variety of dried seeds used for culinary purposes.
The nut seen in the franchise is the common walnut which is the seed of the fruit called drupe produced by the trees in the genus Juglans.
In both Franchise and reality, nuts are used as human food.
The members of the Thorston family, also known as the Nut family, have the word "nut" at the end of their name.