Wrapped or wound tightly with a second length of yarn or wire in a tight spiral, often by means of a ''gimping machine'', leaving the core yarn straight and protected (''[http://www.google.com/search?q=%22gimped+yarn%22 gimped yarn]''). Also, generally, wrapped or twisted with string or wire (''[http://books.google.com/books?q=%22gimped+buttons%22 gimped buttons]'').