ring test(redirected from ring precipitin test)
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Related to ring precipitin test: Ouchterlony test
ring test[′riŋ ‚test]
The simplest of the precipitin tests for antigen-antibody reaction; the solution containing antigen is layered on a solution containing antibody; a white disk or precipitate forms at the point where the two solutions diffuse until optimum concentration for precipitation is reached.