classification /clas·si·fi·ca·tion/ (klas″ĭ-fĭ-ka´shun) the systematic arrangement of similar entities on the basis of certain differing characteristics.
adansonian classification numerical taxonomy.
Angle's classification a classification of dental malocclusion based on the mesiodistal position of the mandibular dental arch and teeth relative to the maxillary dental arch and teeth; see under malocclusion.
Bergey's classification a system of classifying bacteria by Gram reaction, metabolism, and morphology.
Caldwell-Moloy classification classification of female pelves as gynecoid, android, anthropoid, and platypelloid; see under pelvis.
FIGO classification any of the classification systems established by the International Federation of Gynecology and Obstetrics for the staging of gynecological cancers.
Gell and Coombs classification a classification of immune mechanisms of tissue injury, comprising four types: type I, immediate hypersensitivity reactions, mediated by interaction of IgE antibody and antigen and release of histamine and other mediators; type II, antibody-mediated hypersensitivity reactions, due to antibody-antigen interactions on cell surfaces; type III, immune complex, local or general inflammatory responses due to formation of circulating immune complexes and their deposition in tissues; and type IV cell-mediated hypersensitivity reactions, initiated by sensitized T lymphocytes either by release of lymphokines or by T-cell–mediated cytotoxicity.
Keith-Wagener-Barker classification a classification of hypertension and arteriolosclerosis based on retinal changes.
Lancefield classification the classification of hemolytic streptococci into groups on the basis of serologic action.
New York Heart Association (NYHA) classification a functional and therapeutic classification for prescription of physical activity for cardiac patients.
Revised European American Lymphoma (REAL) Classification a classification of lymphomas based on histologic criteria, dividing them into three main categories: B-cell neoplasms, T- or NK-cell neoplasms, and Hodgkin's disease.
Lance·field classification (l ns f ld )n. A serologic classification of hemolytic streptococci, dividing them into groups A to O. |
Lancefield classification
the classification of streptococci into groups on the basis of cell wall antigen. Each group is indicated by a letter from A to V. Some species are antigenically heterogeneous.
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