n (anatomy) A round nodule, small eminence, or warty outgrowth, especially those found on bones for the attachment of a muscle or ligament or small elevations on the surface of a tooth.
n (botany) A small rounded wartlike protuberance of the roots of some leguminous plants; the lip of certain orchids, cactus|cacti.
n (pathology) A small rounded nodule forming the characteristic lesion of tuberculosis.