Kalmar "pachyderma" (wanda kuma aka rubuta "pachyderm") tana nufin rukuni na dabbobi masu shayarwa manya masu kauri waɗanda yawanci suna da yatsu uku akan kowace ƙafa. Wannan rukunin ya haɗa da dabbobi kamar giwaye, rhinoceroses, da hippopotamuses. Kalmar "pachyderma" ta samo asali ne daga kalmomin Helenanci "pachy-" ma'ana "kauri" da "derma" ma'ana "fata." A ilimin likitanci, "pachyderma" kuma yana iya nufin wani kauri na fata da ke hade da wasu cututtuka.