What does RBC stand for?

• A. Red Blood Cell Count
• B. Red Blood Cells
• C. White Blood Cells
• D. Hematocrit

Answer: (A)

RBC is a common lab abbreviation you’ll see on blood tests, and it refers to the Red Blood Cell Count. This is the numeric value that tells you how many erythrocytes are present in a given volume of blood, typically reported per microliter. It’s used to assess conditions like anemia or polycythemia by comparing the count to normal reference ranges.

The other options describe what the cells or the test measure, but they aren’t the standard expansion of this acronym in the context of a lab result. Red Blood Cells would refer to the cells themselves (not the count), White Blood Cells is a different cell type, and hematocrit is a separate measurement that indicates the proportion of blood volume made up by red cells, not the actual cell count.