…a comb or tuft of feathers, fur, or skin on the head of a bird or other animal…
…(in the legs of many mammals, birds, and dinosaurs) a ridge at the front of the head of the tibia or tibiotarsus to which the main extensor muscle of the thigh is attached…
…(in many mammals) a bony ridge on the top of the skull to which the jaw muscles are attached…
…a recreational trail that extends from the Mexican to the Canadian border, from California to Washington, and that follows mountain ridges for 2,600 miles (4,200 km)…
