Nut (fruit)

nutsnutnutlettree nutsnuttytrue nutnutletsnut treesnutshellsnuttier
A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible.wikipedia
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Fruit

fruitsfruitingfresh fruit
A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible.
However, in botany, a fruit is the ripened ovary or carpel that contains seeds, a nut is a type of fruit and not a seed, and a seed is a ripened ovule.

Nutshell

shellhard shellnut shells
A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible.
A nutshell is the outer shell of a nut.

Seed

seedsseed coatkernel
A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible. In botany, the term "nutlet" specifically refers to a pyrena or pyrene, which is a seed covered by a stony layer, such as the kernel of a drupe.
Nuts are the one-seeded, hard-shelled fruit of some plants with an indehiscent seed, such as an acorn or hazelnut.

Hazelnut

hazelnutshazel nutfilbert
Most seeds come from fruits that naturally free themselves from the shell, unlike nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary.
The hazelnut is the nut of the hazel and therefore includes any of the nuts deriving from species of the genus Corylus, especially the nuts of the species Corylus avellana.

Chestnut

Castaneachestnutschestnut tree
Most seeds come from fruits that naturally free themselves from the shell, unlike nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary.
The name also refers to the edible nuts they produce.

Acorn

acorns acornsacorn flour
Most seeds come from fruits that naturally free themselves from the shell, unlike nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary.
The acorn, or oaknut, is the nut of the oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae).

Almond

almondsPrunus dulcisbitter almond
The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense.
The fruit of the almond is a drupe, consisting of an outer hull and a hard shell with the seed, which is not a true nut, inside.

Pecan

Carya illinoinensispecansCarya illinoensis
The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense.
The seed is an edible nut used as a snack and in various recipes, such as praline candy and pecan pie.

Pistachio

pistachiosPistacia verapistachio nuts
The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense.
The tree produces seeds that are widely consumed as food.

Walnut

walnutsJuglanswalnut trees
The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense.
A walnut is the nut of any tree of the genus Juglans (Family Juglandaceae), particularly the Persian or English walnut, Juglans regia.

Food allergy

food allergiesfood allergensallergy
This most often comes up regarding food allergies, a person may be allergic specifically to peanuts (which are not tree nuts but legumes), whereas others may be allergic to the wider range of nuts that grow in trees.
Common foods involved include cow's milk, peanuts, eggs, shellfish, fish, tree nuts, soy, wheat, rice, and fruit.

Oak

Quercusoak treeoak trees
The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on their species.

Lithocarpus

pasaniastone oakstone-oak
The seed is a nut very similar to an oak acorn, but with a very hard, woody nut shell (hence the genus name, from Greek lithos, stone, + carpos, seed).

Betulaceae

birchbirch familyshrub birch
Betulaceae, the birch family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, hazels, hornbeams, hazel-hornbeam, and hop-hornbeams numbering a total of 167 species.

List of culinary nuts

Culinary Nutsedible nuts, edible beans, edible cerealsList of edible nuts
In addition to botanical nuts, fruits and seeds that have a similar appearance and culinary role are considered to be culinary nuts.

Beech

Fagusbeech treebeechwood
The fruit is a small, sharply three–angled nut 10 – long, borne singly or in pairs in soft-spined husks 1.5 – long, known as cupules.

Tree

treessaplingarboreal
In common use, a "tree nut" is, as the name implies, any nut coming from a tree.
Nuts may be gathered by animals such as squirrels that cache any not immediately consumed.

Hazel

Corylushazel treehazel trees
The fruits are nuts 1–2.5 cm long and 1–2 cm diameter, surrounded by an involucre (husk) which partly to fully encloses the nut.

Drupe

stone fruitdrupesdrupaceous
In botany, the term "nutlet" specifically refers to a pyrena or pyrene, which is a seed covered by a stony layer, such as the kernel of a drupe.
Tryma is a specialized term for such nut-like drupes that are difficult to categorize.

Hornbeam

CarpinushornbeamsEuropean Hornbeam
The fruit is a small nut about 3–6 mm long, held in a leafy bract; the bract may be either trilobed or simple oval, and is slightly asymmetrical.

Lists of foods

List of foods
* – a nut is a fruit composed of a hard shell and a seed, where the hard-shelled fruit does not open to release the seed (indehiscent).

Corylus maxima

filbertfilbertsC. maxima
The fruit is a nut produced in clusters of 1–5 together; each nut is 1.5–2.5 cm long, fully enclosed in a 3–5 cm long, tubular involucre (husk).

List of edible seeds

edible seedsseedsedible seed
According to the botanical definition, nuts are a particular kind of fruit.

Inedible

A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible.

Dehiscence (botany)

dehiscentindehiscentcaducous
In general usage, a wide variety of dried seeds are called nuts, but in a botanical context "nut" implies that the shell does not open to release the seed (indehiscent).