Definition of heartwater in US English:

heartwater

noun

  • Veterinary Medicine. A disease affecting cattle, sheep, goats, and wild ungulates in parts of Africa and certain tropical islands, which is a vasculitis resulting in pericardial and pleural effusion, haemorrhage into the tissues, and fever, often with prominent neurological signs, and is caused by the rickettsia-like bacterium Cowdria ruminantium, transmitted by the ticks of the genus Amblyomma (bont ticks).

Origin

Late 17th century (in an earlier sense). From heart + water, perhaps after German Hertz-Wasser in all senses.

Pronunciation

heartwater

/ˈhɑːtˌwɔːtə/