1. Bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent
   "sewellels created extensive tunnel systems in the forest floor";
   - mountain beaver, Aplodontia rufa

Derived forms: sewellels

Type of: gnawer, rodent

Part of: Aplodontia, genus Aplodontia

Encyclopedia: Sewellel