The filberts of the hazel nut.
filbert definition by Webster's New World
- the edible nut of a hazel, esp. of a cultivated European tree (Corylus avellana or C. maxima); hazelnut
- a tree bearing this nut
Origin: Middle English filberde, philliberd, probably via Norman French (noix de) filbert, (nut of) Philibert, after St. Philibert, whose feast came in the nutting season
filbert definition by American Heritage Dictionary
Origin: Middle English, from Old French (nois de) filbert, (nut of) Philbert, after Saint Philibert (died 684), whose feast day in late August coincides with the ripening of the nut.