A peculiar boat used by several uncivilized nations, formed of the trunk of a tree hollowed out, and sometimes of several pieces of bark joined together, and again of hide. They are of various sizes, according to the uses for which they are designed, or the countries to which they belong. Some carry sail, but they are commonly rowed with paddles, somewhat resembling a corn-shovel; and instead of rowing with it horizontally, as with an oar, they manage it perpendicularly. In Greenland and Hudson Bay, the Esquimaux limits of America, skin-boats are chiefly in use, under the name of kaiack, oomiak, baidar, &c.