1. to cause red blood cells to clump or stick together, typically as a result of an antigen-antibody reaction
Usage: chiefly British spelling; American spelling is hemagglutinate; technical/medical term; transitive verb

Examples

• The virus can haemagglutinate red blood cells in laboratory tests.
• Certain antibodies haemagglutinate erythrocytes when exposed to incompatible blood types.
• The antigen caused the blood cells to haemagglutinate within minutes.
• Researchers used haemagglutination assays to detect the presence of the pathogen.
• The serum haemagglutinated the test sample, confirming the infection.