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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