path·o·phys·i·ol·o·gy 
(păth′ō-fĭz′ē-ŏlə-jē)
(păth′ō-fĭz′ē-ŏlə-jē)n.
1. The functional changes associated with or resulting from disease or injury.
2. The scientific study of such changes. In both senses also called physiopathology.
path′o·phys′i·o·logic (-ə-lŏjĭk), path′o·phys′i·o·logi·cal (-ĭ-kəl) adj.
path′o·phys′i·olo·gist n.