Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
gel dif·fu·sion pre·cip·i·tin tests in one di·men·sion
precipitin tests in which antigen solution and antibody incorporated in agar are layered in tubes, permitting effective diffusion in the vertical dimension; the antibody-containing agar may be overlaid directly with antigen solution (single [gel] diffusion in one dimension).
Farlex Partner Medical Dictionary © Farlex 2012
radial immunodiffusionAbbreviation: RID
A means of measuring the amount of antigen in a sample in which a solution containing the antigen is dropped into a gel evenly impregnated with antibody. The diameter of the ring that precipitates around the solution varies directly with the amount of antigen in the solution.
See also: immunodiffusion
Medical Dictionary, © 2009 Farlex and Partners