Biped

A biped is an animal that travels across surfaces supported by two legs.

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Bipedal locomotion is walking, running, and standing on two legs (as opposed to four). It is a process requiring complex interaction of mechanical and control-system characteristics. Humans are capable of performing such motion because their spines are s-curved and their heels are round. Whether such a system has evolved in an animal species or been engineered in a robot, many of the same issues are inevitably involved.

Walking: Walking is the main form of animal locomotion on land, distinguished from running and crawling. When executed in shallow water, it is usually described as wading. The word is derived from the Old English walcan (to roll)....

Running: Running is by definition the fastest means for an animal to move on foot. It is defined in sporting terms as a gait in which at some point all feet are off the ground at the same time. It is a form of aerobic exercise....

Standing: Standing is a human position in which the body is held upright and supported only by the feet, referred to as an orthostatic state....