1) Oligodipsia 
A physiologic condition, perhaps caused by hypertonicity of body fluids, insufficient to initiate drinking but at times sufficient to sustain drinking when started; loosely, oligodipsia. ... Synonym: insensible thirst, subliminal thirst. ... Origin: hypo-+ G. Dipsa, thirst ... (05 Mar 2000) ... 
(hi″po-dip´se-ә) abnormally diminished thirst.
Type: Term Pronunciation: hī′pō-dip′sē-ă Definitions: 1. A physiologic condition, perhaps caused by hypertonicity of body fluids, insufficient to initiate drinking but at times sufficient to sustain drinking when started; loosely, oligodipsia. Synonyms: insensible thirst, subliminal thirst
hypodipsia A diminished thirst with a consequential reduction of fluid intake.