A snubnosed revolver is a small, medium, or large frame revolver with a short barrel, generally less than 3 inches in length. Smaller such revolvers are often made with "bobbed" or "shrouded" hammers
A Colt Cobra and a Smith & Wesson Model 36 snubnosed revolvers
Webley .450 "British Bull Dog" model - 1870s
.32 caliber Smith & Wesson Safety Hammerless
In American English, a pocket pistol is any small, pocket-sized semi-automatic pistol, and is suitable for concealed carry in a pocket or a similar small space.
Snubnosed revolver
…designed from the outset to be chambered for higher-powered cartridges such as the .38 Special, considered to be a powerful caliber for a concealable pocket pistols of the day. The Smith & Wesson Model 10 or Military & Police is a revolver of worldwide popularity. In production since 1899, it is a medium-sized…
Original Remington Model 95 derringer
Nineteenth Century Remington Vest-Pocket Pistol No. 1, .22 caliber, on display at the Cody Firearms Museum, Buffalo Bill Center of the West Cody, Wyoming.
Colt Model 1903 Pocket Hammerless