Sewellel

from WordNet (r) 3.0 (2006)

sewellel
    n 1: bulky nocturnal burrowing rodent of uplands of the Pacific
         coast of North America; the most primitive living rodent
         [syn: {mountain beaver}, {sewellel}, {Aplodontia rufa}]

from The Collaborative International Dictionary of English v.0.48

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]