The most severe form of acne lesion, a nodule is a large, deep-seated, pus-filled, often painful lump Acne with nodules often results in permanent scarring and requires treatment by a physician Sometimes called an acne "cyst "
a small node or knob-like area of tissue; in rheumatoid arthritis patients may develop rheumatoid nodules especially over the forearms which are often associated with a more aggressive form of arthritis
a small node (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment) small rounded wartlike protuberance on a plant A person of rank above a commoner; a nobleman; a peer
A nodule is a small round lump which is found on the roots of certain plants. a small round raised part, especially a small swelling on a plant or someone's body (nodulus, from nodus; NODE). In geology, a rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules usually are elongated and have a knobby irregular surface; they are generally oriented parallel to the bedding. Chert and flint, clay ironstone, and phosphorites commonly occur as nodules. Manganese-rich nodules are found on the ocean floor
A large, usually roughly spherical piece of stone such as flint which was selected as a material from which to remove flakes or blades for the manufacture of stone tools and projectile points