Most seeds come from fruit that naturally free themselves from the shell, but this is not the case in nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary. The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pistachios, and Brazil nuts, are not nuts in a botanical sense. Common usage of the term often refers to any hard-walled, edible kernel as a nut. Nuts are an energy-dense and nutrient-rich food source.

Botanically, a nut is a fruit with a woody pericarp developing from a syncarpous gynoecium. True nuts include, for example, chestnut, hazelnut and filbert. Culinarily, the term 'nut' is used much more widely, and includes examples of drupes (such as pecans and almonds) or seeds (such as pine nuts and peanuts).

Also widely known as nuts are dry drupes, which include pecans, almonds, macadamia (Macadamia integrifolia), candlenut (Aleurites moluccanus) and the water caltrop (Trapa bicornis). A drupe is an indehiscent fruit that has an outer fleshy part consisting of the exocarp, or skin, and mesocarp, or flesh, which surround a single pit or stone, the endocarp with a seed (kernel) inside. In a dry drupe, the outer parts dry up and the remaining husk is part of the ovary wall or pericarp, and the hard inner wall surrounding the seed represents the inner part of the pericarp.

Walnuts and hickories (Juglandaceae) have fruit that are difficult to classify. They are considered to be nuts under some definitions but are also referred to as drupaceous nuts.

In common use, a "tree nut" is, as the name implies, any nut coming from a tree. 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 on trees.

The sweet potato arrived in Europe with the Columbian exchange. It is recorded, for example, in Elinor Fettiplace's Receipt Book, compiled in England in 1604.

Nuts are eaten by humans and wildlife. Because nuts generally have a high oil content, they are a significant energy source. Many seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a snack food, ground to make nut butters, or pressed for oil that is used in cooking and cosmetics.

Nuts used for food are a common source of food allergens. Reactions can range from mild symptoms to severe ones, a condition known as anaphylaxis, which can be life-threatening. The reaction is due to the release of histamine by the body in response to an allergen in the nuts, causing skin and other possible reactions. Many experts suggest that a person with an allergy to peanuts should avoid eating tree nuts, and vice versa.

The nuts linked to from this page are: acorn; almond; beech nuts; betel nut; brazil nut; bush mango; filbert; ginkgo nut; kola nut; candlenut; cashew; chestnut; coconut; hazelnut; macadamia; ogbono; palm nut; peanut; pecan; pine nut; pistachio; walnut.

The alphabetical list of all the nut-based recipes on this site follows, (limited to 100 recipes per page). There are 4197 recipes in total:

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Paifala (Pineapple and Coconut Pasties)      Origin: American Samoa	Paneer Lababdar      Origin: India	Party Cupcakes      Origin: Britain
Pakistani Chicken Biryani      Origin: Pakistan	Paneer Makhani      Origin: India	Pasanda Sauce      Origin: Britain
Palandi      Origin: Sri Lanka	Paneer Makhanwala      Origin: India	Pashka      Origin: Russia
Palandy      Origin: Sri Lanka	Paneer Maza (Chilli Paneer)      Origin: India	Pasilla Mole      Origin: Britain
Palauan Fish Soup      Origin: Palau	Paneer Pasanda      Origin: India	Paska Babka (Easter Babka)      Origin: Belarus
Palaver 'Sauce'      Origin: West Africa	Paneer Sukka      Origin: India	Paska Babka (Easter Babka)      Origin: Russia
Palaver Chicken      Origin: Ghana	Paneer Tikka Masala      Origin: India	Paska Babka (Easter Babka)      Origin: Ukraine
Palestinian Meat Stuffing      Origin: Palestine	Panettone      Origin: Italy	Paska Bobka (Polish Easter Bread)      Origin: Poland
Palm Soup Base #2      Origin: Liberia	Panforte      Origin: Italy	Paskalya Çöreği (Turkish Easter Bread)      Origin: Turkey
Palusami (Corned Beef, Taro Greens and Coconut Milk)      Origin: Solomon Islands	Panforte II      Origin: Italy	Paskha (Russian Easter Cheesecake)      Origin: Russia
Palusami      Origin: Fiji	Pangiallo romano (Roman Christmas Cake)      Origin: Italy	Passatelli in Brodo (Passatelli in Broth)      Origin: Italy
Palusami (Coconut Cream and Tinned Meat in Taro Leaves)      Origin: Nauru	Pangiallo romano (Roman Christmas Cake)      Origin: Vatican City	Passatelli in Brodo (Passatelli in Broth)      Origin: San Marino
Palusami      Origin: Samoa	Pani Popo (Bread Rolls Cooked in Coconut Milk)      Origin: Samoa	Passion Cake      Origin: Britain
Palusami (Coconut Cream and Onion in Taro Leaves)      Origin: Samoa	Pani Popo (Bread Rolls Cooked in Coconut Milk)      Origin: American Samoa	Passover Banana Sponge Cake      Origin: Jewish
Palusami (Corned Beef, Taro Greens and Coconut Milk)      Origin: Tuvalu	Panjeeri (Nuts, Seeds and Tree Sap Snack)      Origin: Pakistan	Passover Matzoh Pudding      Origin: Jewish
Palusami (Coconut Cream and Onion in Taro Leaves)      Origin: Tuvalu	Panjiri      Origin: India	Pastai Briwgig a Llugaeorn (Pork Mince and Cranberry Mini Pies)      Origin: Welsh
Palusami (Corned Beef, Taro Greens and Coconut Milk)      Origin: Kiribati	Pansotti di Rapallo (Pansotti with Walnut Sauce)      Origin: Italy	Pastai Briwgig Eidion a Nionod (Leek and Caerphilly Cheese Crumble Tart)      Origin: Welsh
Palusami      Origin: American Samoa	Pão de Cacau (Chocolate Loaf)      Origin: Sao Tome	Pastai Cig Llo (Veal Pie)      Origin: Welsh
Palusami (Coconut Cream and Onion in Taro Leaves)      Origin: Wallis Futuna	Pão Doce      Origin: Sao Tome	Pastai Cig oen Cymraeg a Phwmpen (Welsh Lamb and Marrow Pie)      Origin: Welsh
Palusami (Corned Beef, Taro Greens and Coconut Milk)      Origin: Marshall Islands	Papas de Mandioca (Cassava Porridge)      Origin: Mozambique	Pastai Cwnhingen (Rabbit Pie)      Origin: Welsh
Palusami II      Origin: Kiribati	Papaya and Orange Soup      Origin: Anguilla	Pastai Ystumllwynarth (Oystermouth Pie)      Origin: Welsh
Pamplona de Puerco (Barbecued Stuffed, Rolled Pork)      Origin: Uruguay	Papaya Chicken and Coconut Milk      Origin: Solomon Islands	Pastel De Choclo (Corn Pudding)      Origin: Argentina
Pampoenkokies (Christmas Fruit Fritters)      Origin: South Africa	Papaya Pudding      Origin: Aruba	Pašticada (Croatian Beef Stew)      Origin: Croatia
Pan Haggis      Origin: Scotland	Papeeta Kari (Green Papaya Curry)      Origin: India	Pastiera Napoletana (Naples Easter Cakes)      Origin: Italy
Pan Puddings      Origin: Scotland	Papuan Banana Cake      Origin: Papua New Guinea	Pastilla (Moroccan Meat Pie)      Origin: Morocco
Pan-fried Megrim Sole with Creamed Spinach      Origin: Britain	Papuan Banana Cake      Origin: Papua	Pastilla au Poulet (Chicklen Pastilla)      Origin: Morocco
Pan-fried Turbot with Summer Truffle Sauce      Origin: Britain	Paradise Cake      Origin: Scotland	Patiala Chicken Curry      Origin: India
Panang Curry Paste      Origin: Thailand	Paradise Slice      Origin: Scotland	Patina Cotidiana II (Everyday Casserole II)      Origin: Roman
Pane della colomba di Pasqua (Italian Easter Dove Bread)      Origin: Italy	Parcha Bozbash (Lamb Soup with Chestnuts and Quince)      Origin: Armenia	Patina Versatilis (Upside-down Dish)      Origin: Roman
Paneer Butter Masala      Origin: India	Parcha Bozbash II (Lamb Soup with Chestnuts, Quince, and Prunes)      Origin: Georgia	Patina Versatilis Vice Dulci (Nut Custard Turnover)      Origin: Roman
Paneer Capsicum Curry      Origin: India	Parmentier de Canard (Duck Parmentier)      Origin: France	Patinam Apicianam (Apician Casserole)      Origin: Roman
Paneer Kofta      Origin: India	Parsley Pesto      Origin: Saint Pierre	Patinam ex Lacte (Milk Casserole)      Origin: Roman
Paneer Korma      Origin: Britain	Parsnip and Apples      Origin: Ireland
Paneer Lababdar      Origin: India	Parthade Curry      Origin: India

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