tubercle

tu·ber·cle

noun \ˈt(y)ü-bər-kəl\

Definition of TUBERCLE

1

: a small knobby prominence or excrescence: as a : a prominence on the crown of a molar tooth b : a small rough prominence (as the greater tubercle or adductor tubercle) on a bone usually being smaller than a tuberosity and serving for the attachment of one or more muscles or ligaments c : an eminence near the head of a rib that articulates with the transverse process of a vertebra d : any of several prominences (as the acoustic tubercle) in the central nervous system that mark the nuclei of various nerves

2

: a small discrete lump in the substance of an organ or in the skin; especially : the specific lesion of tuberculosis consisting of a packed mass of epithelioid cells, giant cells, disintegration products of white blood cells and bacilli, and usually a necrotic center