Pachydermata
Pronunciation : Pach`y*der"ma*ta, n. pl. [NL.
Part of Speech : fr.
Definition : Defn: A group of hoofed mammals distinguished for the thickness of their skins, including the elephant, hippopotamus, rhinoceros, tapir, horse, and hog. It is now considered an artificial group.
Gr. thick-skinned; pachy`s thick + skin.] (Zo?l.)
Source : Webster's Unabridged Dictionary, 1913