solipedal
/ˌsɒlɪˈpiːdəl/Definitions
1. adjective
Having a single foot or being supported by a single foot, especially of animals.
“The solipedal mammals roamed the forest freely.”
2. noun
A soliped, especially a member of the suborder Perissodactyla, including the horse, tapir, and rhinoceros.
“The solipedal species were well adapted to their environment.”