A short dictionary entry on the ripple, a toothed comb through which flax stalks are drawn to strip off seed capsules before retting. It notes the tool's ancient use in Egypt for removing seed from dhura and in Pliny's time for grain, and describes how a handful of flax is fanned out and pulled through the teeth. Three illustrations show a flat ripple, a cylindrical rippling comb, and a person using the comb.