nodule
nounUK /ˈnɒdjuːl/
US /ˈnɑːdʒuːl/
A nodule is a small lump or bump.
The doctor found a small nodule on the plant's root.
OTHER MEANINGS
2. A small rounded lump of mineral or rock.
The miners found manganese nodules on the ocean floor.
3. A small swelling on a plant root that holds nitrogen-fixing bacteria.
Clover roots have nodules that help the soil.
4. A small abnormal lump of tissue in the body.
The scan showed a harmless nodule on her thyroid.