any of various substances that interfere with the action of the alpha receptors.
alphaRead more in this article about some frequently asked questions and fun facts related to our definitions.
alpha femaleRead more in this article about some frequently asked questions and fun facts related to our definitions.
- alpha and omega,
- alpha angle,
- alpha brass,
- alpha carotene,
- alpha cell,
- alpha centauri,
- alpha centauri system
Compare beta blocker.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of a class of drugs that prevent the stimulation of alpha adrenoceptors, a type of receptor in the sympathetic nervous system, by adrenaline and noradrenaline and that therefore cause widening of blood vessels: used in the treatment of high blood pressure and prostatic hyperplasia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
A drug that opposes the excitatory effects of norepinephrine released from sympathetic nerve endings at alpha-adrenergic receptors and causes vasodilation and a decrease in blood pressure.alpha-adrenergic blocking agent
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.