insipidus (dĪ´ə-bēʹtĭs ĭn-sĭpʹĭ-dəs) noun. A chronic metabolic disorder characterized by intense thirst and excessive urination, caused by a deficiency of the pituitary hormone vasopressin, diabetes insipidus
diabetes mellitus diabetes melitus
diabetes (dī´ə-bēʹtĭs, -tēz) noun. Any of several metabolic disorders marked by excessive discharge of urine and persistent thirst, especially one of the two types of diabetes mellitus, diabetes, kencing manis.