adrenergic
1. Describing a cell, especially a neuron, or a cell receptor that is stimulated by adrenaline, noradrenaline, or related substances. See also adrenoceptor.

2. Describing a nerve fibre or neuron that releases adrenaline or noradrenaline when stimulated. Compare cholinergic.

adrenergic (ad-rĕ-ner-jik) adj. describing or relating to nerve fibres that release noradrenaline as a neurotransmitter. a. receptor (adrenoceptor) any of the receptors that are stimulated by noradrenaline and/or adrenaline, of which there are two types, alpha (α) and beta (β), each with subtypes (α₁, α₂, β₁, and β₂). Compare cholinergic.

adrenergic Of nerve endings, secretion of the neurotransmitters adrenalin or noradrenaline into the synapse on the arrival of a nerve impulse. Adrenergic nerve endings are characteristic of the sympathetic nervous system.