an arrondissement of the Nièvre, in France, extending over 620 square miles. It is divided into six cantons, and subdivided into sixty-six communes, containing 58,667 inhabitants. The chief place, of the same name, is situated at the junction of the Nouaix with the Loire. It contains 734 houses, and 3394 inhabitants. COSACO is a place where anchors and other heavy iron articles are manufactured, especially cannon balls for the navy. Long. 2° 50'. E. Lat. 47° 24'. N.