American Heritage Dictionary
(2)
Century Dictionary
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
The project's first goal is to integrate an insulin pump and continuous blood glucose monitor to closely replicate a healthy pancreas for patients with type 1 diabetes-patients whose pancreases no longer produce insulin, which is used by the body to control blood glucose levels.— Medlogs - Recent stories
People with diabetes are unable to produce sufficient insulin, a hormone that helps control blood sugar levels, because of defects in the insulin-producing cells in the pancreas.— Health News from Medical News Today
Diabetes Type 2 - You don't produce enough insulin, or your insulin is not working properly.— Health News from Medical News Today
The insulin-sensitising drug rosiglitazone enhanced protection by low levels of insulin, the study found.— Belfasttelegraph.co.uk - Frontpage RSS Feed

American Heritage Dictionary (1)
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You can expect to see this word about twice a week.