Nodule

Nodule may refer to:


 * Nodule (geology), a small rock or mineral cluster
 * Manganese nodule, a metallic concretion found on the seafloor
 * Nodule (medicine), a small aggregation of cells
 * Root nodule, a growth on the roots of legumes
 * A feature of mollusc sculpture
 * Nodule of vermis, an external feature of the cerebellum