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alpha-adrenergic receptor

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noun Physiology.
  1. alpha receptor.
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alpha receptor

or al·pha-re·cep·tor

noun
  1. a site on a cell that, upon interaction with epinephrine or norepinephrine, controls vasoconstriction, intestinal relaxation, pupil dilation, and other physiological processes.
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Compare beta receptor.

Origin of alpha receptor

First recorded in 1960–65
Also called alpha-adrenergic receptor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

alpha-adrenergic receptor in Medicine

alpha-adrenergic receptor

n.
  1. Any of various cell membrane receptors that can bind with norepinephrine and related substances that activate or block the actions of the cells containing such receptors; these cells initiate physiological responses such as vasoconstriction, pupil dilation, and contraction of pilomotor muscles.alpha-receptor
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.