ˈglükəˌgän noun
( -s )
Etymology: gluc- + -agon (perhaps from Greek agōn, present participle of agein to lead, drive) — more at agent
: a crystalline protein that is obtained from the islets of Langerhans of the pancreas, is present in some preparations of insulin, and increases the content of sugar in the blood by increasing the rate of breakdown of glycogen in the liver — called also hyperglycemic-glycogenolytic factor