hazelnuts
Hazelnuts are true nuts. The fruit arises from a compound ovary and does not open to release its single seed.
nut
plant reproductive body
nut, in botany, dry hard fruit that does not split open at maturity to release its single seed. A nut resembles an achene but develops from more than one carpel (female reproductive structure), often is larger, and has a tough woody wall. Examples of true nuts are the chestnut, hazelnut, and acorn.
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- simple fruit
walnutThe fruit (nut) of a walnut tree and its husk.
Many edible oily seeds are popularly called “nuts,” especially those with a hard shell. Many of these culinary nuts are the seeds of drupe fruits, including walnuts, pistachios, almonds, and coconuts. The peanut is a legume, and the Brazil nut is a seed from a capsule fruit.
This article was most recently revised and updated by Melissa Petruzzello.