insulin Hear it!

insulin definition

in·su·lin (in′sə lin)

noun

  1. a protein hormone secreted by the islets of Langerhans, in the pancreas, which helps the body use sugar and other carbohydrates
  2. a preparation extracted from the pancreas of sheep, oxen, etc. and used hypodermically in the treatment of diabetes mellitus

Etymology: < L insula, island (see isle) + -in: in allusion to the islets of Langerhans

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