a small swelling or aggregation of cells in the body, especially an abnormal one
the area feels firm but has irregular nodules which can be painful to touch
laparotomy showed white nodules in the liver
a small rounded lump of matter distinct from its surroundings, e.g. of flint in chalk, carbon in cast iron, or a mineral on the seabed
flint nodules
in the coal pits nodules of iron ore were mined