tubercle
noun
tu·ber·cle
ˈtü-bər-kəl
ˈtyü-
1
: a small knobby prominence or excrescence especially on a plant or animal : nodule: such as
a
: a protuberance near the head of a rib that articulates with the transverse process of a vertebra
b
: any of several prominences in the central nervous system
c
2
: a small abnormal discrete lump in the substance of an organ or in the skin
especially
: the specific lesion of tuberculosis
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Merriam-Webster unabridged
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