pachyderm
US /ˈpæk.ə.dɝːm/
UK /ˈpæk.ə.dɝːm/
1.
a very large mammal with thick skin, especially an elephant, rhinoceros, or hippopotamus.
:
•
The zoo's newest attraction is a baby pachyderm, a tiny elephant calf.
•
Rhinoceroses and hippopotamuses are also classified as pachyderms.