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A small, rounded lump of tissue or mineral that differs from the material around it.

means A small, rounded lump of tissue or mineral matter, distinct from what surrounds it.

from From Latin 'nodulus,' a 'little knot' — the diminutive of 'nodus,' meaning knot or node. The same root that gives us 'node' and 'noose,' so a nodule is etymologically just a tiny tied-up bundle, which is either comforting or not, depending on where it's growing.

most are
harmless clusters of cells, not tumors
thyroid nodules
found in over half of adults by autopsy
etymology
from latin nodulus, little knot
legume bonus
root nodules host nitrogen-fixing bacteria for plants
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