单词	ripple mark
释义	ripple mark noun 1 : one of a series of small ridges produced especially on sand by the action of wind, a current of water, or waves 2 : a striation across the grain of wood especially on the tangential surface ripple-marked ˈri-pəl-ˌmärkt  adjective Example Sentences Recent Examples on the Web That’s because the grooves were cutting through real-time tidal ripple marks moving through the seamount sediment. Todd Woody, National Geographic, 24 July 2019 Word History First Known Use 1831, in the meaning defined at sense 1
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