n.
Pronunciation: ' glü-k ə - ˌ gän
Function: noun
Etymology: gluc- + -agon (perh. from Greek ag ō n, present participle of agein to lead, drive) ― more at AGENT
Date: 1923
: a protein hormone that is produced especially by the islets of Langerhans and that promotes an increase in the sugar content of the blood by increasing the rate of glycogen breakdown in the liver