noun. undefined

noun. A rodent mammal of the family Haplodontidæ, Haplodon rufus, inhabiting Washington and Oregon and parts of California

noun. A peculiar gregarious burrowing rodent (Haplodon rufus), native of the coast region of the Northwestern United States. It somewhat resembles a muskrat or marmot, but has only a rudimentary tail. Its head is broad, its eyes are small and its fur is brownish above, gray beneath. It constitutes the family Haplodontidæ. Called also boomer, showt'l, and mountain beaver.

noun. The mountain beaver (Aplodontia rufa).

noun. bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent

"This extinct mammal, related to the living sewellel, is the only known horned rodent and the smallest horned mammal."

gnawer  rodent  

boomer  mountain beaver  showt'l