A stationery fastening device made of thin, soft metal, with a round head and a flat, split shank, which is spread after insertion in a hole in a stack of pages, in much the same way as a cotter pin or a split rivet.

plural of bank paper

plural of bond paper

plural of xuan paper

plural of brown paper

plural of construction paper

plural of filter paper

plural of graphing paper

(Britain, informal) synonym of toilet paper

plural of kitchen paper