noun
also jaag·ziek·te or jag·siek·te or jag·ziek·te ˈyägˌsēktə, -ˌzēk-
( -s )
Etymology: Afrikaans jagsiekte, from jag hunt + siekte sickness
: an apparently infectious disease of sheep that is characterized by proliferation of the pulmonary alveolar epithelium and occlusion of the alveoli and terminal bronchioles and that is usually held to be caused by an unidentified filterable virus