adj.
Pronunciation: - ' pä-z ə -tiv, - ' päz-tiv
Function: adjective
Date: circa 1930
: having or being a positive serum reaction especially in a test for the presence of an antibody
– se · ro · pos · i · tiv · i · ty \ - ˌ pä-z ə - ' ti-v ə -t ē \ noun