noun
: a virus disease of pigeons which is closely related to fowl pox and the virus of which is often used to produce a vaccine against fowl pox that is safer though less lastingly effective than that prepared with fowl pox virus
noun
: a virus disease of pigeons which is closely related to fowl pox and the virus of which is often used to produce a vaccine against fowl pox that is safer though less lastingly effective than that prepared with fowl pox virus
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012