The Collaborative International Dictionary
Sterrometal
Sterrometal \Ster"ro*met`al\, n. [Gr. ? firm, solid + E. metal.] Any alloy of copper, zinc, tin, and iron, of which cannon are sometimes made.
Wiktionary
sterrometal
n. (context obsolete English) An alloy of copper, zinc, tin, and iron, used in making cannon.