noun, noun which may take the genitive case particle 'no'
Botanical term for a hard-shelled dry fruit that does not split open to release its seed. In everyday language, 木の実 or ナッツ is more common.
ドングリはブナ科の堅果です。
Acorns are nuts of the Fagaceae family.
クルミは堅果に分類される。
Walnuts are classified as nuts.