pachyderm
pachyderm[ˈpakɪdəːm]noun- a very large mammal with thick skin, especially an elephant, rhinoceros, or hippopotamus
厚皮动物,厚皮兽类(尤指象、犀牛、河马)
派生pachydermaladjectivepachydermatous[ˌpakɪˈdəːmətəs]adjectivepachydermicadjective语源- mid 19th cent.: from French pachyderme, from Greek pakhudermos, from pakhus 'thick' + derma 'skin'
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