Longman Dictionary of Contemporary English homepage

Topic: MEDICINE

Date: 1900-2000
Language: Latin
Origin: insula ( INSULAR); because insulin is made by body organs called the "islets of Langerhans"

insulin

noun
     
in‧su‧lin [uncountable]
HBM a substance produced naturally by your body which allows sugar to be used for energy:
diabetic patients requiring insulin
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