What is "sewellel"

Sewellel \Se*wel"lel\, n. [Of American Indian origin.] (Zo["o]l.) 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 Haplodontid[ae]. Called also boomer, showt'l, and mountain beaver.

n. The mountain beaver (''Aplodontia rufa'').

n. bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent [syn: mountain beaver, Aplodontia rufa]