Is fibromyalgia a noun?
fibromyalgia. noun. fi·bro·my·al·gia ˌfī-(ˌ)brō-ˌmī-ˈal-j(ē-)ə : a chronic disorder characterized by widespread pain, tenderness, and stiffness of muscles and associated connective tissue structures that is typically accompanied by fatigue, headache, and sleep...