se·ro·neg·a·tive adjective \ˌsir-ō-ˈne-gə-tiv\
First Known Use of SERONEGATIVE
se·ro·neg·a·tive adjective \-ˈneg-ə-tiv\ (Medical Dictionary)
: having or being a negative serum reaction especially in a test for the presence of an antibody <early seronegative syphilis> <a seronegative patient>
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