Definition that contains thick skin
- rhino massive powerful herbivorous odd-toed ungulate of southeast Asia and Africa having very thick skin and one or two horns on the snout
- rhinoceros massive powerful herbivorous odd-toed ungulate of southeast Asia and Africa having very thick skin and one or two horns on the snout
- pachyderm any of various nonruminant hoofed mammals having very thick skin: elephant; rhinoceros; hippopotamus
- plectognath tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines
- plectognath fish tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines