The process or result of red blood cells clumping together due to the action of antibodies, viruses, or other substances.
From 'hemagglutinate' + '-tion' (noun-forming suffix). The term names the process of blood cell clumping that occurs when specific substances are present.
Scientists use hemagglutination as a quick diagnostic test—if your blood cells clump when mixed with a suspect virus or antibody, boom, you've identified what you're looking for without needing fancy equipment!
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