ˈbȯrnə- noun
Usage: usually capitalized B
Etymology: translation of German bornasche krankheit, from Borna, Saxony, Germany, where the disease was especially prevalent in the 1890s
: a virus disease of equines related to sleeping sickness that occurs as an acute infectious inflammation of the brain and spinal cord usually giving rise to violent trembling, unsteady gait, inability to swallow, great excitement and signs of pain, or to stupor