1. A graduated glass chamber used in laboratory medicine to count blood cells under a microscope.
Usage: Also spelled hemacytometer (U.S. variant).; Technical term used in hematology and clinical pathology.

Examples

• The technician used a haemacytometer to determine the red blood cell count.
• A haemacytometer consists of a thick glass slide with a precisely etched grid pattern.
• The laboratory ordered new haemacytometers to replace the older equipment.
• Under the microscope, the haemacytometer's grid helps standardize cell counting.
• Blood samples were diluted and placed in the haemacytometer for analysis.