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insulin

noun [U]
 
 
/ˈɪn.sjʊ.lɪn/ US  /-sə-/

Definition

a hormone in the body that controls the amount of sugar in the blood: She has to have insulin injections for her diabetes.Specific medicines and drugsSpecific types of drug
(Definition of insulin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of insulin