type 1 diabetes

noun

ˈtīp-ˈwən- 

: 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

Examples of type 1 diabetes in a Sentence

Recent Examples on the Web

But while type 1 diabetes usually appears suddenly in kids or young adults, LADA develops more gradually and is typically diagnosed in people who are 30 or older. —Beth Krietsch, SELF, 11 Nov. 2025

In Connecticut, mother of three Felicia Lessing said her oldest child had type 1 diabetes and celiac disease, making access to food assistance even more critical. —Aliss Higham, MSNBC Newsweek, 31 Oct. 2025

Diabetes Diabetic ketoacidosis (DKA) is a serious complication that can happen to people with diabetes, especially those with type 1 diabetes. —Lauren O'Connor, Health, 23 Oct. 2025

Her dad also had type 1 diabetes, and Jordan appreciated that Megan understood all that goes into managing the disease. —Sam Reed, Glamour, 22 Oct. 2025

Word History

First Known Use

1982, in the meaning defined above

Medical Definition

type 1 diabetes

noun

ˌtīp-ˈwən- 

: diabetes of a form that usually develops during childhood or adolescence and is characterized by a severe deficiency of 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, juvenile diabetes, juvenile-onset diabetes, type 1 diabetes mellitus