Acorn

Acorn

Acorn

The seed or fruit of an oak.

Acorn

The seed or fruit of an oak.

The almond is native to Iran, from northwestern Saudi Arabia, north through western Jordan, Israel, Lebanon, western Syria, to southern Turkey. It is a small deciduous tree, growing to between 4 and 10 meters in height, with a trunk of up to 30 centimeters in diameter. The young shoots are green at first, becoming purplish where exposed to sunlight, then grey in their second year. The leaves are 1 cm long and 1.2–4 cm broad, with a serrated margin and a 2.5 cm petiole. The flowers are white or pale pink, 3–5 cm diameter with five petals, produced singly or in pairs before the leaves in early spring. The fruit is a drupe 3.5–6 cm long, with a downy outer coat. The outer covering or exocarp, (fleshy in other members of Prunus such as the plum and cherry), is instead a leathery grey-green coating called the hull, which contains inside a hard shell, and the edible seed, commonly called a nut in culinary terms. Generally, one seed is present, but occasionally there are two. In botanical terms, an almond is not a true nut. The reticulated hard woody shell (like the outside of a peach pit) surrounding the edible seed is called the endocarp. The fruit is mature in the autumn, 7–8 months after flowering.

Almond Tree and Fruit

The almond is native to Iran, from northwestern Saudi Arabia, north through western Jordan, Israel,…

An illustration of the hexagonal bolt head showing measurements. The measurement of diameter, D, is used to calculate the dimensions. The diameter of the head and the nut, H, is 1 ½D ₌ ⅛, and the distance of T is half the diameter.

U.S. Standard Hexagonal Bolt Head

An illustration of the hexagonal bolt head showing measurements. The measurement of diameter, D, is…

A stately tree being 80 to 100 feet high, bearing staminate flowers in long slender aments and nuts enclosed two or three together in a globose prickly envelop called a bur.

Chestnut

A stately tree being 80 to 100 feet high, bearing staminate flowers in long slender aments and nuts…

A chestnut, with prickly outer shell.

Chestnut

A chestnut, with prickly outer shell.

Children gathering nuts.

Children gathering nuts

Children gathering nuts.

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

A drilling machine made out of nuts

Drill

A drilling machine made out of nuts

A woman using a fondue pot to make chocolate covered nuts.

Fondue

A woman using a fondue pot to make chocolate covered nuts.

Projection of a hexagonal nut.

Projection of Hexagonal Nut

Projection of a hexagonal nut.

Juglans regia is the common walnut tree. The fruit are oval with a green husk. The tree grows between forty and sixty feet tall.

Fruiting Branch of Juglans Regia

Juglans regia is the common walnut tree. The fruit are oval with a green husk. The tree grows between…

A tree that produces the kola nut.

Kola

A tree that produces the kola nut.

A small block for holding a bolt.

Nut

A small block for holding a bolt.

Pictured are various types of nuts. (1) Peruvian almond husk above, nut below, (2) Tabebuia, (3) Betel nut, (4) Chilian nut, (5) Pistachio, (6) Pili nut, (7) Marking nut, (8) Water chestnut, and (9) Singhara Nut.

Nuts

Pictured are various types of nuts. (1) Peruvian almond husk above, nut below, (2) Tabebuia, (3) Betel…

A South American palm whose fibrous make up is used in industry and it also produces te coquilla nut.

Coquila Palm

A South American palm whose fibrous make up is used in industry and it also produces te coquilla nut.

It grows wild around the shores of the Mediterranean and many parts of the East, producing a puffy pod, containing one or generally two nested seeds with two swellings on one side. It is much used in olios Spain, is an important article in French cookery and has been cultivated from a very early period in the warmer regions of the old world.

Chick Pea

It grows wild around the shores of the Mediterranean and many parts of the East, producing a puffy pod,…

The seed-vessel and seed of a plant, called also earth-nut.

Peanut

The seed-vessel and seed of a plant, called also earth-nut.

A wrench is a tool used to provide grip and mechanical advantage in applying torque to turn objects usually rotary fasteners, such as nuts and bolts or keep them from turning

Nut and Pipe Wrench

A wrench is a tool used to provide grip and mechanical advantage in applying torque to turn objects…