a small swelling or aggregation of cells in the body, especially an abnormal one 小结节,小瘤 ■(一般作 root nodule)a swelling on a root of a leguminous plant, containing nitrogen-fixing bacteria (豆科植物的)根瘤
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 (矿物)结核,小圆块