/
ˈtjuːbək(ə)l/
n.
  - Anatomy,  Zoology,  & Botany  a small rounded projection or protuberance, especially on a bone or on the surface of an animal or plant.
 - Medicine  a small nodular lesion in the lungs or other tissues, characteristic of tuberculosis.
 
Derivative
- tuberculate
  
/-ˈbəːkjʊlət/
 adj. 
Etymology
C16: from L. tuberculum, dimin. of tuber (see tuber).