Definitions for "Riffle"
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.
A ripple in a stream or current of water; also, a place where the water ripples, as on a shallow rapid.
A broken water surface. Usually caused by a rocky stream bottom, and/or a stream's gradient.
Keywords:  shuffle, fidget, thumb, halves, deck
a form of shuffling in which the cards from two halves of the pack are interleaved.
adj., v. The noisy, familiar type of shuffle.
shuffling by splitting the pack and interweaving the two halves at their corners
Slats or bars spaced evenly in the bottom of a sluice box. The slats create a groove that traps and holds particles of gold. See Suction Dredging.
a firearm that uses a spiral groove cut into the barrel to spin a projectile (usually
bars or slats across bottom of sluice that catch nuggets, as of gold.
Keywords:  flick, flutter, twitch, pack, noise
twitch or flutter; "the paper flicked"
To flick the ends of a pack of cards in order to make a clicking noise or to show the cards.
Keywords:  wave, liquid, small, surface
a small wave on the surface of a liquid