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the formation of a precipitate or agglomerate in the form of downy tufts or floccules.
a form of precipitin reaction in which precipitation occurs over a narrow range of antigen:antibody ratio, owing chiefly to peculiarities of the antibody (precipitin).
Etymology: L, floccus, flock of wool
a serological test in which a positive result depends on the degree of flocculent precipitation produced in the material being tested. Some tests for syphilis, including the Venereal Disease Research Laboratories slide test, are flocculation tests.