Chancroid n. (Med.) A venereal sore, resembling a chancre in its seat and some external characters, but differing from it in being the starting point of a purely local process and never of a systemic disease; called also soft chancre.
... gonorrhea, syphilis and chancroid. Of these, gonorrhea is the most widespread, syphilis the most serious. Chancroid is of comparatively ... — Woman - Her Sex and Love Life • William J. Robinson