pachyderm
/ˈpækɪdɜːm/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）。
派生词
pachydermal
adjectivepachydermatous
adjectivepachydermic
adjective词源
mid 19th cent.: from French pachyderme, from Greek pakhudermos, from pakhus 'thick' + derma 'skin'.