noun
1.
a. : the undulating surface of a ridge or trough produced in incoherent granular material (as loose sand) by wind, currents of water, or the agitation of waves
b. : one of the ridges on such a surface
2. : a striation across the grain of wood especially on the tangential surface caused by storied cambial and other cells
• ripple-marked ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ adjective