Definition of type 1 diabetes
: a form of diabetes mellitus that usually develops during childhood or adolescence and is characterized by a severe deficiency in insulin secretion resulting from atrophy of the islets of Langerhans and causing hyperglycemia and a marked tendency toward ketoacidosis
— called also insulin-dependent diabetes, insulin-dependent diabetes mellitus, type 1 diabetes mellitus
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Merriam-Webster unabridged
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Time Traveler for type 1 diabetes
The first known use of type 1 diabetes was in 1982
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