from the GNU version of the Collaborative International Dictionary of English
- n. a flat, horny process on the tarsus of some toads, -- used in burrowing.
from The Century Dictionary and Cyclopedia
- n. A flattened, leathery projection, found on the hind foot of toads belonging to the genera Scaphiopus, Pelobates, etc. It is used in digging; hence the popular name of spade-foot.
Sorry, no etymologies found.