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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.


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  • 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

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