Definition of "riffles" [riffles]

• Plural form of riffle. (noun)
• Third-person singular simple present indicative form of riffle. (verb)

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• "Swinging nymphs in the riffles is especially effective – be sure to try orange, sulphur-looking patterns."
• "The shape generally suggests a mayfly nymph, and the fly can be especially productive in riffles or pools prior to a hatch."
• "Warm water carries less oxygen than cold water, so when water temperatures get high, trout will congregate in riffles and in pools below tumbling water where the oxygen content is increased."