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vasoconstriction

n. narrowing of blood vessels, which is controlled by vasomotor nerves of the sympathetic nervous system or by such agents as vasopressin or sympathomimetic drugs. It has the effect of increasing blood pressure. See also ergot derivative.

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Psychology term of the day

May 9th 2024

reciprocal

reciprocal

n. the number that when multiplied by another number gives a result of 1. The reciprocal of x is therefore 1/x and that of 1/x is x. So, for example, 1/4 is the reciprocal of 4.