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upper limb in humans. Three long bones form the framework of the arm: the humerus of the upper arm, and the radius (outer bone) and ulna (inner bone) of the forearm. The radius and ulna run parallel but meet at their ends in such a manner that the radius can rotate around the ulna. This arrangement permits turning the forearm to bring the hand palm up (supination) or palm down (pronation). The radius and ulna hinge with the bones of the hand at the wrist, and with the humerus at the elbow. The bicepsbiceps
, any muscle having two heads, or fixed ends of attachment, notably the biceps brachii at the front of the upper arm and the biceps femoris in the thigh. Originating in the shoulder area, the heads of the biceps merge partway down the arm to form a rounded mass of tissue
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 brachii, a muscle of the upper arm, bends the arm at the elbow; the tricepstriceps,
any muscle having three heads, or points of attachment, but especially the triceps brachii at the back of the upper arm. One head originates on the shoulder blade and two on the upper-arm bone, or humerus.
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 brachii straightens the arm. Movement of the arm across the chest and above the head is accomplished by the pectoral muscles of the chest and deltoid muscles of the shoulder, respectively. In an adult the arm is normally five sixths as long as the leg.



the upper extremity in man consisting of the shoulder, forearm, and hand (carpus, metacarpus, and phalanges of the fingers). The arm is a more developed grasping extremity in man than in man’s ancient ancestors, the Anthropomorphidae.

The transformation from Anthropomorphidae to man was largely promoted by freeing the anterior extremities, or arms, from locomotion and body-support functions and converting them into organs capable of performing work operations. As the arm became adapted to work, its structure substantially changed, becoming sharply distinct from the structure of the anterior extremity of Anthropomorphidae.

The most significant structural changes occurred in the hand. In Anthropomorphidae the hand has an underdeveloped thumb and the remaining fingers are greatly elongated; in contrast, the human hand is characterized by a powerfully developed thumb that is essential in performing all work operations. The remaining fingers of the human hand are significantly shorter than those of Anthropoidea but are nevertheless capable of the most delicate and differentiated movements.

In man’s development, the development of the arm as a work organ occurred simultaneously with the progressive development of the brain.

The body processes in brachiopods, the tentacles in cephalopods, and the mobile or nonmobile rays of echinoderms are sometimes called arms.


The upper or superior limb in humans which comprises the upper arm with one bone and the forearm with two bones.
(control systems)
A robot component consiting of an interconnected set of links and powered joints that move and support the wrist socket and end effector.
(engineering acoustics)
A ridge or a spur that extends from a mountain.
A side of an angle.
(naval architecture)
The part of an anchor extending from the crown to one of the flukes.
A long, narrow inlet of water extending from another body of water.
A combat branch of a military force; specifically, a branch of the U.S. Army, such as the Infantry Armored Cavalry, the primary function of which is combat.
(Often plural) Weapons for use in war.
To supply with arms.
To ready ammunition for detonation, as by removal of safety devices or alignment of the explosive elements in the explosive train of the fuse.
The perpendicular distance from the line along which a force is applied to a reference point.


Advanced RISC Machine.

Originally Acorn RISC Machine.


Advanced RISC Machines Ltd.


["The Annotated C++ Reference Manual", Margaret A. Ellis and Bjarne Stroustrup, Addison-Wesley, 1990].


References in periodicals archive ?
Next cycle you start all over again, collecting the same armload of paper, paying the same bill, and trying to communicate the same wishes to the typesetter or artist (who has by now forgotten how you want it done).
With the corn still on the stalks, every armload was heavy.
We're all been guilty of grabbing a great armload of the latest hit novels, deciding only once we've made it home which of your lucky family members will get the Howard Jacobson and who bags the Peter Carey.
Taylor gave her an armload of roses and a bearhug, followed by a torrent of bouquets and tears from fans.
Not only does the USC coach have an armload of film, but three bunsen burners, a complex set of tubes, gyroscopes, centrifuges, the works.
Customers bought the special offers by the armload and ignored Boots' dearer and more profitable ranges.
The poor fellow ended up with three fractured vertebrae and a ruptured spleen from falling down a flight of hotel stairs with an armload of Gideon Bibles.
This new relationship is underwritten with an armload of fresh trade and industrial agreements.
His granddaughters were presented with an armload of medals, including the Bronze Star, the Good Conduct Medal, a Presidential Unit Citation, the European-African-Middle Eastern Campaign Medal with two bronze stars and an arrowhead; the World War II Victory Medal, the Army of Occupation Medal with Germany Clasp, the Combat Infantryman Badge, the Belgian Fourragere, the Netherlands Orange Lanyard, the Honorable Service Lapel Button for World War II and the Basic Parachute Badge.
An armload of stalks is laid into the trough and pushed over the right-hand edge of the box by the operator's left hand.
After coming back from the seminar with an armload of primary-source documents, Ehrman hopes to do better teaching students who often come into her class knowing little about the Cold War period.
Armed with some gumption, a few basic tools, and an armload of reading material that explained when to plant what, how to care for the growing garden, and how to get rid of destructive pests, the Sunday Farmer was ready to make a real contribution to the war effort.