| NOUN | cognition | complement fixation test | a blood test in which a sample of serum is exposed to a particular antigen and complement in order to determine whether or not antibodies to that particular antigen are present |
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| Meaning | A blood test in which a sample of serum is exposed to a particular antigen and complement in order to determine whether or not antibodies to that particular antigen are present; used as a diagnostic test. | |
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| Narrower | Wassermann test, Wasserman reaction, Wassermann | A blood test to detect syphilis |
| Broader | blood test | A serologic analysis of a sample of blood |
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