Lewis & Short

† 1. anthrax, ăcis, m., = ἄνθραξ (coal).

  1. I. Natural cinnabar (the color of which is like a burning coal), Vitr. 7, 8.
  2. II. In medic., a virulent ulcer (in pure Lat., carbunculus), Aem. Macr. de Herb. c. de Sabina.