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Scratch′-back, a kind of toy, which, when drawn over a person's back, makes a sound as if his coat was torn; Scratch′-brush, a name given to various forms of brushes; Scratch′-coat, the first coat of plaster; Scratch′er, a bird which scratches for food.—adv.

The concrete is then applied to these laths in six coats, three on each side, and termed respectively the scratch coat, the rough coat, and the fining coat.