relative specificity

rel·a·tive spec·i·fic·i·ty

the specificity of a medical screening test as determined by comparison with the same type of test (for example, specificity of a new serologic test relative to specificity of an established serologic test).

rel·a·tive spe·ci·fi·ci·ty

(rel'ă-tiv spes'i-fis'i-tē) The specificity of a medical screening test as determined by comparison with the same type of test (e.g., specificity of a new serologic test relative to specificity of an established serologic test).