|See also plague an acute infectious febrile disease characterized by chills, prostration, delirium, and formation of buboes: caused by the bite of a rat flea infected with the bacterium Yersinia pestis|
bubonic plague n.
A contagious, often fatal epidemic disease caused by the bacterium Yersinia pestis, transmitted from person to person or by the bite of fleas from an infected host, especially a rat, and characterized by chills, fever, vomiting, diarrhea, and the formation of buboes.
Note: From 1347 to 1351, a disease known as the Black Death, similar to the bubonic plague, entered Europe from Asia and killed a large percentage of the population, sometimes wiping out entire towns. It caused widespread social changes in Europe.