<unk>  is excessive thirst or excess drinking. The word derives from the Greek () "very thirsty", which is derived from (, "much, many") + (, "thirst").<unk>  is a nonspecific symptom in various medical disorders. It also occurs as an abnormal behaviour in some non-human animals, such as in birds.
Polydipsia
Nocturia
Polyuria
Adipsia
Dysuria
Hypersthenuria
Hyperchlorhydria
Hyperosmia