TUBERCLE

noun Etymology: Latin tuberculum, diminutive of tuber Date: 1578 a small knobby prominence or excrescence especially on a plant or animal ; nodule : as, a protuberance near the head of a rib that articulates with the transverse process of a vertebra, any of several prominences in the central nervous system, nodule b, a small abnormal discrete lump in the substance of an organ or in the skin