[moc.ca.sin] n [Virginia Algonquian mockasin] (ca. 1612) 1 a: a soft leather heelless shoe or boot with the sole brought up the sides of the foot and over the toes where it is joined with a puckered seam to a U-shaped piece lying on top of the foot b: a regular shoe having a seam on the forepart of the vamp imitating the seam of a moccasin
2. a: water moccasin b: a snake (as of the genus Natrix) resembling a water moccasin