imidazoline

noun
im·​id·​az·​o·​line | \ ˌim-ə-ˈdaz-ə-ˌlēn How to pronounce imidazoline (audio) \

Medical Definition of imidazoline

: any of three dihydro derivatives C3H6N2 of imidazole with adrenergic blocking activity also : a derivative of these