Medical Definition of false–positive
: relating to or being a test result or an individual that is erroneously classified in a positive category (as of diagnosis) because of imperfect testing methods or procedures a false–positive pregnancy test … one must bear in mind the cost of needless medical procedures generated by the huge number of false-positive mammograms …—David Plotkin, The Atlantic Monthly, June 1996—compare false-negative
false positivenoun Another problem with the test … is that it also produces a number of false positives; that is, a number of neonates with elevated trypsin levels the first time they are tested are found not to have elevated levels on the second test.—The Journal of the American Medical Association, 9 Nov. 1984
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