dehydration
noun [ U ] medical specialized uk/ˌdiː.haɪˈdreɪ.ʃən/ us/ˌdiː.haɪˈdreɪ.ʃən/
脱水，极度干渴
a drop below normal levels of water in the body
Diarrhoea and vomiting lead to dehydration unless fluids are taken to replace the loss. 如果不及时补充失去的液体，腹泻和呕吐会导致脱水。
More than 11,000 children die every day around the world because of dehydration caused by diarrhoea. 全世界每天都有1.1万名以上的儿童死于痢疾引起的脱水。