| NOUN | cognition | agglutination test | a blood test used to identify unknown antigens |
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| Meaning | A blood test used to identify unknown antigens; blood with the unknown antigen is mixed with a known antibody and whether or not agglutination occurs helps to identify the antigen; used in tissue matching and blood grouping and diagnosis of infections. | |
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| Narrower | Widal test, Widal's test | A test for detecting typhoid fever and other salmonella infections |
| heterophil test | A blood test to detect heterophil antibodies that agglutinate sheep red blood cells | |
| Broader | blood test | A serologic analysis of a sample of blood |
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