mackinaw

Etymology
Respelling of, a strait between Lake Huron and Lake Michigan, an island in the strait, and an important trading-post on the island; ultimately from.

Noun

 * 1) A heavy woolen cloth.
 * 2) A blanket made of wool, formerly distributed to the Amerindians by the U.S. government.
 * 3) A flat-bottomed cargo boat; mackinaw boat.