The Collaborative International Dictionary of English v.0.48:
Quadrupedal \Quad*ru"pe*dal\, a. (Zool.) Having four feet; of or pertaining to a quadruped. [1913 Webster]WordNet (r) 3.0 (2006):
quadrupedal adj 1: having four feet [syn: quadrupedal, quadruped, four- footed] [ant: biped, bipedal, two-footed]