All 4 Uses

diabetes
in
Arrowsmith
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Clif was occasionally irritating; he hated open windows; he talked of dirty socks; he sang "Some die of Diabetes" when Martin was studying; and he was altogether unable to say anything directly.†
Chpt 5

diabetes = a disease where the body cannot properly regulate blood sugar levels
Rouncefield the Chicago surgeon, a diabetes specialist from Omaha, a Pittsburgh internist—stood massed the faculty members.†
Chpt 8 *
And on the 'practical' side, you gif me twenty years of a school that is precise and cautious, and we shall cure diabetes, maybe tuberculosis and cancer, and all these arthritis things that the carpenters shake their heads at them and call them 'rheumatism.'†
Chpt 12
They've already lessened the terrors of meningitis and pneumonia, and yellow fever is on the verge of complete abolition through Noguchi's work, and I have no doubt their hospital, with its enormous resources and splendidly co-operating minds, will be the first to find something to alleviate diabetes.†
Chpt 38

Definitions:

(1) (diabetes)
a long-term disease in which the body has trouble controlling blood sugar because it either doesn’t make enough of the hormone insulin or can’t use it properly

Type 1 diabetes happens when the body stops making insulin; people must take insulin every day and it often begins in childhood. Type 2 diabetes happens when the body still makes insulin but doesn’t use it well; it is often linked to extra weight and inactivity.
(2) (meaning too rare to warrant focus)