Noun has 2 senses

• haematocrit(n = noun.linkdef) hematocrit, packed cell volume - the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit;


• haematocrit(n = noun.artifact) hematocrit - a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood;