norepinephrine

Definition of norepinephrine

n.1.A hormone (C8H11NO3) secreted by the adrenal medulla; it also serves as a neurotransmitter, released at synapses; called also noradrenaline. Chemically it is 2-amino-1-(3,4-dihydroxyphenyl)ethanol. It is a precursor of epinephrine in the body.

Related Words

catecholamine, monoamine neurotransmitter, noradrenaline, vasoconstrictive, vasoconstrictor
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