ty·pol·o·gy 
(tī-pŏlə-jē)
(tī-pŏlə-jē)n. pl. ty·pol·o·gies
1. The study or systematic classification of types that have characteristics or traits in common.
2. A theory or doctrine of types, as in scriptural studies.
ty′po·logi·cal (tī′pə-lŏjĭ-kəl), ty′po·logic (-lŏjĭk) adj.
ty′po·logi·cal·ly adv.
ty·polo·gist n.