RAPIDFIRE
Rap"id-fire`, Rap"id-fir`ing, a.
(a) (Gun.) Firing shots in rapid succession.
(b) (Ordnance) Capable of being fired rapidly; -- applied to single-
barreled guns of greater caliber than small arms, mounted so as to be
quickly trained and elevated, with a quick-acting breech mechanism
operated by a single motion of a crank or lever (abbr. R. F.);
specif.: (1)
Definition: In the United States navy, designating such a gun using fixed
ammunition or metallic cartridge cases; -- distinguished from breech-
loading (abbr. B. L.), applied to all guns loading with the charge in
bags, and formerly from quick-fire. Rapid-fire guns in the navy also
sometimes include automatic or semiautomatic rapid-fire guns; the
former being automatic guns of not less than one inch caliber, firing
a shell of not less than one pound weight, the explosion of each
cartridge operating the mechanism for ejecting the empty shell,
loading, and firing the next shot, the latter being guns that require
one operation of the hand at each discharge, to load the gun. (2)
Definition: In the United States army, designating such a gun, whether
using fixed or separate ammunition, designed chiefly for use in coast
batteries against torpedo vessels and the lightly armored batteries
or other war vessels and for the protection of defensive mine fields;
– not distinguished from quick-fire. (3)
Definition: In Great Britain and Europe used, rarely, as synonymous with
quick-fire.
Source: Webster’s Unabridged Dictionary 1913 Edition