diabetes insipidus: a rare form of diabetes resulting from a deficiency of vasopressin (the pituitary hormone that regulates the kidneys); characterized by the chronic excretion of large amounts of pale dilute urine which results in dehydration and extreme thirst
diabetes: a polygenic disease characterized by abnormally high glucose levels in the blood; any of several metabolic disorders marked by excessive urination and persistent thirst
fluidram: a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters