ridged

Having a ridge or back; having an angular, projecting backbone.

In zoology, carinate; costate; having ridges or carinæ on a surface, generally longitudinal ones. When the ridges run crosswise, the surface is said to be transversely ridged.

Rising in a ridge or ridges; ridgy.

Simple past tense and past participle of ridge.

having a ridge or shaped like a ridge or suggesting the keel of a ship