The story
From leuko- + encephalitis.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: An epizootic disease of horses, characterized by drowsiness, imperfect vision, partial paralysis of the throat, twitching of the muscles of the shoulder, unsteady gait, and softening of the white substance of the frontal lobes; forage poisoning. Full definition →
From leuko- + encephalitis.
Etymology from Wiktionary, CC BY-SA 4.0.