exsiccosis

noun
ex·​sic·​co·​sis | \ ˌek-si-ˈkō-səs How to pronounce exsiccosis (audio) \
plural exsiccoses\ -​ˌsēz How to pronounce exsiccoses (audio) \

Medical Definition of exsiccosis

: insufficient intake of fluids also : the resulting condition of bodily dehydration