Dictionary.net

the quality of being specific to a particular organism; "host specificity of a parasite"

the quality of being specific rather than general; "add a desirable note of specificity to the discussion"; "the specificity of the symptoms of the disease"

the quality of being specific to a particular organism; "host specificity of a parasite"

the quality of being specific rather than general; "add a desirable note of specificity to the discussion"; "the specificity of the symptoms of the disease"

Measures for assessing the results of diagnostic and screening tests. Sensitivity represents the proportion of truly diseased persons in a screened population who are identified as being diseased by the test. It is a measure of the probability of correctly diagnosing a condition. Specificity is the proportion of truly nondiseased persons who are so identified by the screening test. It is a measure of the probability of correctly identifying a nondiseased person. (From Last, Dictionary of Epidemiology, 2d ed)

The state of being specific or of having specific or special properties.

A direct relation of cause and effect between the substances such as the toxin-antitoxin relation, the latter only being produced by the former, or a special disease being produced by a certain organism.