pachy·derm /ˈpækɪˌdɚ/
厚皮類動物,遲鈍的人
pach·y·derm n. Zool. Any of various nonruminant hoofed mammals having very thick skin, including the elephant, rhinoceros, and hippopotamus, one of the Pachydermata.
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pachyderm
n : any of various nonruminant hoofed mammals having very thick
skin: elephant; rhinoceros; hippopotamus