How come adrenergic relates to noradrenaline and but sometimes adrenaline is surrounded by the schoolbook?

Seems everybody uses adrenaline as adrenergic instead of noradrenaline what gives? I judge I answered this same question days ago. force out for it.
Noradrenaline and adrenaline are both catecholamines and are synthesized from the amino acid phenylalanine. Both compounds deed on the same type of receptors to produce similar affects. The receptors are call adrenergic. However noradrenaline (norepinephrine) is produced from neurones while adrenaline (epi) is produced in the adrenal medulla (the is within the suprarenal gland above the kidneys).