Source : Webster's Revised Unabridged Dictionary (1913)

Scraper \Scrap"er\, n.
   1. An instrument with which anything is scraped.
      Specifically:
      (a) An instrument by which the soles of shoes are cleaned
          from mud and the like, by drawing them across it.
      (b) An instrument drawn by oxen or horses, used for
          scraping up earth in making or repairing roads,
          digging cellars, canals etc.
      (c) (Naut.) An instrument having two or three sharp sides
          or edges, for cleaning the planks, masts, or decks of
          a ship.
      (d) (Lithography) In the printing press, a board, or
          blade, the edge of which is made to rub over the
          tympan sheet and thus produce the impression.

   2. One who scrapes. Specifically:
      (a) One who plays awkwardly on a violin.
      (b) One who acquires avariciously and saves penuriously.

Source : WordNet®

scraper
     n : any of various hand tools for scraping