[ rim-fahyuh r ]
/ ˈrɪmˌfaɪər /


(of a cartridge) having the primer in a rim encircling the base.Compare center-fire(def 1).
(of a firearm) designed for the use of such cartridges.

Origin of rimfire

An Americanism dating back to 1865–70; rim + fire
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019