n. a gun; a revolver. (Underworld.) : Rocko pulled out his cannon and aimed it at Marlowe's throat.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
cannon
1400, from O.Fr. canon, from It. cannone "large tube," augmentive of L. canna (see cane). Cannon-fodder (1891) translates Ger. kanonenfutter (cf. Shakespeare's food for powder in I Hen. IV). Cannon-ball is from 1663.
Cannon (kān'ən) Pronunciation Key
American astronomer noted for her work on classifying stellar spectra. Cannon classified the spectra of 225,300 stars brighter than magnitude 8.5, as well as 130,000 fainter stars.