the world > health and disease > ill health > a disease > suppuration > [noun] > a suppuration > abscess > boil > core of (2)
The more or less hard mass of dead tissue in the centre of a boil. Formerly also apparently a callosity or corn in the feet.
A black crust or core in an ulcer, boil, or bubo, esp. in plague or anthrax. Cf. carbuncle, n. 3a. Obsolete. rare.