Final answer:
Diabetes insipidus is associated with polyuria caused by a lack of anti-diuretic hormone.
Step-by-step explanation:
The form of diabetes associated with polyuria (frequent urination) caused by a lack of anti-diuretic hormone is called Diabetes insipidus. Diabetes insipidus is a condition in which the body is unable to regulate the balance of water due to a deficiency or resistance to anti-diuretic hormone (ADH). This leads to excessive urination, as the body is unable to retain water properly.
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