adj. biped, two legged, bipedal

nm. biped, animal which walks on two legs; two-legged creature

(n.) = bipedal ; two-legged ; biped.
Ex: The set of tracks found were made by a bipedal dinosaur which used its forelegs in climbing a steep slope.
Ex: When people mindlessly do something without knowing any reason for doing it, they become like two-legged cattle.
Ex: For this reason he dubbed man the 'ungrateful biped'.