1. a small rounded lump or mass, especially of tissue or mineral matter
2. a small swelling or aggregation of cells in plant or animal tissue
Usage: medical; biological
3. a rounded mineral concretion found in sedimentary rock
Usage: geological

Examples

• The doctor found a small nodule on the patient’s lung during the X-ray.
• Root nodules on legume plants help fix nitrogen from the soil.
• The geologist discovered iron nodules scattered across the ocean floor.
• A thyroid nodule was detected during her routine medical examination.
• The farmer noticed nodules forming on the roots of his soybean plants.
• Manganese nodules are commonly found on deep sea beds.
• The biopsy revealed that the nodule was benign.