chancre(n = noun.state) - a small hard painless nodule at the site of entry of a pathogen (as syphilis);
is a kind of sore
is a part of lues, lues venerea, pox, syph, syphilis, deer fly fever, rabbit fever, tularaemia, tularemia, yatobyo
Derived form adjective chancrous₁

   A venereal sore or ulcer; specifically, the initial lesion of true syphilis, whether forming a distinct ulcer or not; -- called also hard chancre, indurated chancre, and Hunterian chancre. [1913 Webster]

chancre, n. a painless ulcer developing in venereal disease etc.

Etymology:
F f. L CANCER