gun metal

plural gun metals

1. alternativecountableuncountableAlternative form of gunmetal.

   1 more example

   The pump [of the steam fire-engine], being at the forward end, was made of gun metal and was double acting, having eight brass suction-valves, four on each side, and four discharge valves, opening into the air vessels, to which a double discharge valve, having one opening on the inside and two on the outside, was attached for the purpose of using two lines of hose.

   1896, William T. King, “John A. Ives & Brother – 1864”, in History of the American Steam Fire-engine, [Boston, Mass.]: [Pinkham Press], →OCLC; reprinted Mineola, N.Y.: Dover Publications, 2001, →ISBN, page 92