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bi·ped·al(bī-pĕd′l) or bi·ped (bī′pĕd′)
1. Having two feet; two-footed.
2. Walking on two feet.
bi·ped′al·ism (-pĕd′l-ĭz′əm), bi′pe·dal′i·ty (-pə-dăl′ĭ-tē) n.
Standing or walking on two feet. ♦ The use of two feet for standing and walking is known as bipedal locomotion. The evolution of bipedal locomotion in humans was aided by the development of an upright head and backbone and of an arched foot.