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