norepinephrine Hear it!

norepinephrine definition

nor·epi·neph·rine (nôr′ep′ə nef′rin, -rēn′)

noun

a hormone or neurotransmitter, CHNO, related to epinephrine, that is used medically to constrict blood vessels and to stop bleeding: it is secreted by the adrenal medulla or liberated at nerve endings to help transmit nerve impulses

Etymology: see nor-

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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