haematocrit

World English Dictionary
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

haematocrit

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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