ad·re·ner·gic 
(ăd′rə-nûrjĭk)
(ăd′rə-nûrjĭk)adj.
1. Activated by or capable of releasing epinephrine or a similar substance, especially in the sympathetic nervous system: adrenergic receptors.
2. Having physiological effects similar to those of epinephrine: an adrenergic amine.
[ADREN(ALINE) + -ERGIC.]
ad′re·nergi·cal·ly adv.