blood pressure

noun Physiology.
the pressure of the blood against the inner walls of the blood vessels, varying in different parts of the body during different phases of contraction of the heart and under different conditions of health, exertion, etc. Abbreviation: BP
Compare diastolic, systolic.


Origin:
1870–75

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World English Dictionary
blood pressure
 
n
the pressure exerted by the blood on the inner walls of the arteries, being relative to the elasticity and diameter of the vessels and the force of the heartbeat

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Etymonline
Word Origin & History

blood pressure
1874, from blood + pressure.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

blood pressure n.

Abbr. BP, B.P. The pressure exerted by the blood against the walls of the arteries, maintained by the contraction of the left ventricle, the resistance of the arterioles and capillaries, the elasticity of the arterial walls, and by the viscosity and volume of the blood. Also called arteriotony.

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Science Dictionary
blood pressure  
The pressure of the blood in the vessels, especially the arteries, as it circulates through the body. Blood pressure varies with the strength of the heartbeat, the volume of blood being pumped, and the elasticity of the blood vessels. Arterial blood pressure is usually measured by means of a sphygmomanometer and reported in millimeters of mercury as a fraction, with the numerator equal to the blood pressure during systole and the denominator equal to the blood pressure during diastole. See more at hypertension, hypotension.

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American Heritage
Cultural Dictionary

blood pressure definition


The pressure of the blood against the walls of the blood vessels, especially the arteries. It is expressed in two figures, said to be one “over” the other: the systolic pressure, which is the pressure when the left ventricle of the heart contracts to push the blood through the body; and the diastolic pressure, which is the pressure when the ventricle relaxes and fills with blood. Blood pressure is affected by the strength of the heartbeat, the volume of blood in the body, the elasticity of the blood vessels, and the age and general health of the person. (See circulatory system.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
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Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
For years many researchers have claimed that salt threatens public health by
  contributing to high blood pressure.
Another found that blood pressure decreased during an afternoon siesta.
Hypertension is the term used to describe high blood pressure.
High blood pressure, also called hypertension, is elevated pressure of the
  blood in the arteries.
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