Beta-adrenergic receptor
beta receptor.
a site on a cell, as of the heart, that, upon interaction with epinephrine or norepinephrine, controls heartbeat and heart contractability, vasodilation, smooth muscle inhibition, and other physiological processes.
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- Beta blocker
any of various substances that interfere with the action of the beta receptors: used primarily to reduce the heart rate or force in the prevention, management, or treatment of angina, hypertension, or arrythmias.
- Beta brass
an alloy consisting of nearly equal proportions of copper and zinc.
- Beta carotene
the most abundant of various isomers of carotene, c 40 h 56 , that can be converted by the body to vitamin a.
- Beta cell
b cell (def 2).
- Beta coefficient
beta (def 6). noun (stock exchange) a measure of the extent to which a particular security rises or falls in value in response to market movements