1. The ratio of the volume of red blood cells to the total volume of blood, expressed as a percentage; used as a measure of oxygen-carrying capacity.
Usage: Medical/clinical term; Also called packed cell volume (PCV)

Examples

• The doctor ordered a hematocrit test to check for anemia.
• A normal hematocrit level for adult males is typically between 41 and 53 percent.
• Her hematocrit was low, indicating she might have iron deficiency anemia.
• Athletes sometimes have higher hematocrit levels due to increased red blood cell production.
• The lab technician measured the patient's hematocrit as part of the complete blood count.