Which animal is described as a pachyderm?

An elephant is an animal that is often referred to as a pachyderm. Pachyderms are a group of large mammals that are characterized by their thick skin. The term pachyderm comes from the Greek words "pachy" meaning thick and "derma" meaning skin. In addition to elephants, other animals that are classified as pachyderms include rhinoceroses, hippopotamuses, and tapirs.