■ noun
1》 a small swelling or aggregation of cells, especially an abnormal one.
↘(usu. root ~ ) a swelling on a root of a leguminous plant, containing nitrogen-fixing bacteria.
2》 a small rounded lump of matter distinct from its surroundings.
Derivatives
nodular adjective
nodulated adjective
nodulation noun
nodulose adjective
Origin
ME: from L. nodulus , dimin. of nodus 'knot'.