bipedal

adj. having two legs, two-legged

Bipedalism is standing, or moving for example by walking, running, or hopping, on two appendages (typically legs). An animal or machine that usually moves in a bipedal manner is known as a biped (//), meaning "two feet" (Latin bi = two + ped = foot).
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Adjective
1. having two feet
(synonym) biped, two-footed
(antonym) quadrupedal, quadruped, four-footed

(n.)
Pertaining to a biped.
  

(n.)
Having two feet; biped.
  

     piebald