N0170800 (nō-sŏl′ə-jē, -zŏl′-)n.pl.no·sol·o·gies1. The branch of medicine that deals with the classification of diseases.2. A classification of diseases.no′so·log′i·cal(-sə-lŏj′ĭ-kəl), no′so·log′ic(-ĭk) adj.no′so·log′i·cal·ly adv.no·sol′o·gist n.EncyclopediaSeeNosologyMedicalSeenosology