Norepinephrin — [nawr-ep-uh-nef-rin, -reen]


  • 1. Also called noradrenaline. Physiology. a neurotransmitter, released by adrenergic nerve terminals in the autonomic and possibly the central nervous system, that has such effects as constricting blood vessels, raising blood pressure, and dilating bronchi.
  • 2. Pharmacology. a commercial form of this substance used for emergency treatment of lowered blood pressure.


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