'haematocrit' definitions:

Definition of 'haematocrit'

(from WordNet)
noun
The ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit [syn: hematocrit, haematocrit, packed cell volume]
noun
A measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood [syn: hematocrit, haematocrit]