blood cell count

https://doi.org/10.1351/goldbook.09638

Number of red blood cells and white blood cells per unit volume in a specimen of venous blood.

Source:
PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1124 (https://doi.org/10.1515/pac-2016-1120)