1. (a.) Having four feet.

2. (n.) An animal having four feet, as most mammals and reptiles; -- often restricted to the mammals.

amphibian aquatic biped biquadratic canine cannibal carnivore cosmopolite feline four four-legged four-rayed foursquare gnawer herbivore insectivore invertebrate mammal mammalian marsupial marsupialian omnivore primate quadric quadrilateral quadrinomial quadrivalent quartic quartile quaternary reptile rodent ruminant scavenger tetractinal tetrad tetravalent ungulate varmint vermin vertebrate