or TRONX, Sr., a town of Belgium, province of Limburg, 11 miles S.W. of Hasselt, on the branch line connecting the latter town with the Liege-Mechlin railway. Manufactures of firearms, cutlery, and lace, are principally carried on. St Tron is celebrated for a battle fought here in 1793, between the French and Austrians, in which the latter were defeated. Pop. 9000.