heart·wa·ter noun \ˈhärt-ˌwȯt-ər, -ˌwät-\
: a serious febrile disease of sheep, goats, and cattle in southern Africa that is caused by a bacterium of the genus Cowdria (C. ruminantium) transmitted by a bont tick (Amblyomma hebraeum)—called also heartwater disease, heartwater fever
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