In terms of, or by means of, bubonic plague.

Of or pertaining to buboes.

(medicine) A contagious, often fatal, epidemic disease caused by the bacterium Yersinia pestis, transmitted by the bite of fleas from an infected person or rodent, especially a rat, and characterized by delirium, chills, fever, vomiting, diarrhea, and the formation of buboes.

plural of bubonic plague