hematocrit

[hi-mat-uh-krit]
noun
1.
a centrifuge for separating the cells of the blood from the plasma.
2.
Also called hematocrit value. the ratio of the volume of red blood cells to a given volume of blood so centrifuged, expressed as a percentage.

Origin:
1890–95; hemato- + -crit < Greek kritḗs judge

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haematocrit or (US) hematocrit (ˈhɛmətəʊkrɪt, ˈhiː-, ˈhɛmətəʊkrɪt, ˈhiː-)
 
n
1.  a centrifuge for separating blood cells from plasma
2.  Also called: packed cell volume the ratio of the volume occupied by these cells, esp the red cells, to the total volume of blood, expressed as a percentage
 
[C20: from haemato- + Greek kritēs judge, from krinein to separate]
 
hematocrit or (US) hematocrit
 
n
 
[C20: from haemato- + Greek kritēs judge, from krinein to separate]

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American Heritage
Medical Dictionary

hematocrit he·mat·o·crit (hĭ-māt'ə-krĭt')
n.
Abbr. Hct
The percentage by volume of packed red blood cells in a given sample of blood after centrifugation.

    The American Heritage® Stedman's Medical Dictionary
    Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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    American Heritage
    Science Dictionary
    hematocrit   (hĭ-māt'ə-krĭt')  Pronunciation Key 
    1. The percentage by volume of red blood cells in a given sample of blood after it has been spun in a centrifuge.

    2. A centrifuge used to determine the relative volumes of blood cells and plasma in a given sample of blood.


    The American Heritage® Science Dictionary
    Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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    Encyclopedia Britannica
    Encyclopedia

    hematocrit

    diagnostic procedure for the analysis of blood. The name is also used for the apparatus in which this procedure is performed and for the results of the analysis. In the procedure, an anticoagulant is added to a blood sample held in a calibrated tube. The tube is allowed to stand for one hour, after which the sedimentation rate (how rapidly blood cells settle out from plasma) is determined. Most acute generalized infections and some local infections raise the rate of sedimentation. A raised sedimentation rate may be among the first signs of an otherwise hidden disease.

    Learn more about hematocrit with a free trial on Britannica.com.

    Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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    Example sentences
    Hematocrit is a blood test that measures the percentage of the volume of whole blood that is made up of red blood cells.
    Blood tests with anthrax also show high hematocrit and low albumin and sodium levels.
    Hematocrit is the percent of red blood cells that are in a blood sample.
    Hematocrit is a measurement of the proportion of blood that is made up of red blood cells.
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