'Sewellel' definitions:

Definition of 'sewellel'

From: WordNet
noun
Bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent [syn: mountain beaver, sewellel, Aplodontia rufa]

Definition of 'Sewellel'

From: GCIDE
  • Sewellel \Se*wel"lel\, n. [Of American Indian origin.] (Zool.) 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 Haplodontidae. Called also boomer, showt'l, and mountain beaver. [1913 Webster]