sinuate

To advance in wavy or curvy manner, to bend, to curve, to wind in and out

“A road that sinuates through the valley.”

Sinuous

Having wavy indentation on its border or edge.

(of gills) Roughly the same height for most of its length, becoming much shallower and then curving back towards the stem before reaching the attachment point.

“In this group of mushrooms, the attachment of the gills to the stipe is sinuate.”