It has palmated hind feet, and a broad, flat tail. It is remarkable for its ingenuity in constructing its valued for its fur, and for the material called castor, obtained from two small bags in the groin of the animal. The European species is Castor fibre, and the American is generally considered a variety of this, although sometimes called Castor Canadensis.
Origin: oe. Bever, as. Beofer, befer; akin to D. Bever, OHG. Bibar, g. Biber, Sw. Bafver, dan. Baever, lith. Bebru, Russ. Bobr', gael. Beabhar, corn. Befer, L. Fibre, and Skr. Babhrus large ichneumon; also as an adj, brown, the animal being probably named from its colour. 253. See brown.