Learn how to say Insulin correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word insulin:
[mass noun] Biochemistry
a hormone produced in the pancreas by the islets of Langerhans, which regulates the amount of glucose in the blood. The lack of insulin causes a form of diabetes.
an animal-derived or synthetic form of insulin used to treat diabetes.
early 20th century: from Latin insula ‘island’ + -in1