polydipsia
noun
poly·dip·sia ˌpä-lē-ˈdip-sē-ə 
: excessive or abnormal thirst
polydipsic
ˌpä-lē-ˈdip-sik
adjective 
Example Sentences
Recent Examples on the Web At Patton, Nunez was treated for schizophrenia and developed psychogenic polydipsia, which drives a pervasive addiction to water. 
San Diego Union-Tribune, 23 Sep. 2019 Psychogenic polydipsia is a chronic disorder in which certain psychiatric patients compulsively consume large quantities of water. San Diego Union-Tribune, 30 June 2019 Though dying from drinking too much fluid might sound like a freak accident, polydipsia is not uncommon in psychiatric hospitals like Springfield. Emily Woodruff, baltimoresun.com, 9 June 2017 Among patients with schizophrenia, those with severe polydipsia have a 75 percent chance of dying before patients without the compulsion to drink water, according to another study published in 2009 in Schizophrenia Research. Emily Woodruff, baltimoresun.com, 9 June 2017
San Diego Union-Tribune, 23 Sep. 2019 Psychogenic polydipsia is a chronic disorder in which certain psychiatric patients compulsively consume large quantities of water. San Diego Union-Tribune, 30 June 2019 Though dying from drinking too much fluid might sound like a freak accident, polydipsia is not uncommon in psychiatric hospitals like Springfield. Emily Woodruff, baltimoresun.com, 9 June 2017 Among patients with schizophrenia, those with severe polydipsia have a 75 percent chance of dying before patients without the compulsion to drink water, according to another study published in 2009 in Schizophrenia Research. Emily Woodruff, baltimoresun.com, 9 June 2017 Word History
Etymology
borrowed from New Latin, from Greek polýdipsos "causing great thirst" (from poly- poly- + -dipsos, adjective derivative of dípsa "thirst," of uncertain origin) + -ia entry 1
First Known Use
1661, in the meaning defined above
Medical Definition
polydipsia
noun
poly·dip·sia ˌpäl-i-ˈdip-sē-ə
: excessive or abnormal thirst