amblypoda

from The Collaborative International Dictionary of English v.0.48

Amblypoda \Am*blyp"o*da\, n. pl. [NL., fr. Gr. ? blunt + ?, ?,
   foot.] (Paleon.)
   A group of large, extinct, herbivorous mammals, common in the
   Tertiary formation of the United States.
   [1913 Webster]