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Medical Definition of Chick-Martin test
1. A method of testing the in vitro efficiency of a bactericidal agent; a standard culture of Salmonella typhi which has been added to a fixed amount of sterilised faeces or yeast is tested for a fixed period (30 minutes), against various concentrations of phenol solution and various concentrations of the disinfectant; the result is expressed as a ratio: the phenol coefficient, which is the highest dilution of the disinfectant under test at which the bacteria are killed, divided by the highest dilution of phenol which sterilises the solution in the same length of time. (05 Mar 2000)