Category:Riffle

Rif"fle, n. Etym: [cf. G. riffeln, riefeln, to groove. Cf. Rifle a Gun.] (mining)

Defn: a trough or sluice having cleats, grooves, or steps across the Bottom for holding quicksilver and catching particles of gold when Auriferous earth is washed; also, one of the cleats, grooves, or Steps in such a trough. Also called ripple.