supercannon

Noun

supercannon (plural supercannons)

1. Synonym of supergun.
   • The introduction of the submarine, the aeroplane, and the dirigible, made possible by the invention of the internal-combustion engine, the use of the wireless telegraph and telephone, and the employment of lethal gases, of supercannon and possibly of aerial torpedoes make obsolete many rules...1919, Robert Lansing, Some Legal Questions of the Peace Conference, Government Print Off, page 10
   • Six or seven battleships, even if in good fighting trim, are little in, themselves, but they may become much if they can ever be assured of striking in co-operation with the adequate and well-trained coastal flotillas and supercannon batteries, if when moving across the Western Mediterranean, at...1921, United States Naval Institute Proceedings 1921-11: Volume 47, Isssue11, United States Naval Institute, pages 1797–1798

   Synonyms:

   supergun