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plural frizels
(firearms, historical) A movable furrowed piece of steel struck by the flint, to throw sparks into the pan, in an early form of flintlock. quotations
To this succeeded the Snaplance [sic], in which a motion was given to the dog, or cock, and a movable plate of steel, called the frizel, or hammer, was placed vertically above the pan to receive the action of the flint.
1832, The Edinburgh Encyclopaedia, volume 10, page 164