a kind of naval
gun invented and produced by Benjamin Berkeley
Hotchkiss (1826–1885),
American inventor and maker of military weapons. These guns, which were made for one-, three- and six-
pound projectiles, were first made for the US Navy and later became part of the
standard armament of most of the
world's navies. They have since been supplanted by guns of even larger
caliber.
—ESTO - Handling Personnel, Part I Approved Glossary