1. small rounded lumps or masses, especially in body tissue or on plant roots
Usage: medical; botanical
2. small mineral concretions found in rock or sediment
Usage: geological

Examples

• The doctor found small nodules in her lung tissue during the scan.
• Nitrogen-fixing bacteria form nodules on the roots of legume plants.
• The thyroid nodules were benign according to the biopsy results.
• Miners discovered manganese nodules on the ocean floor.
• Root nodules help soybeans absorb nutrients from the soil.
• The geologist examined the limestone nodules embedded in the cliff face.