Hypertext Webster Gateway: "Pachydermata"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Pachydermata \Pach`y*der"ma*ta\, n. pl. [NL., fr. Gr. ?
thick-skinned; pachy`s thick + ? skin.] (Zo["o]l.)
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.
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