path·o·log·i·cal 
(păth′ə-lŏjĭ-kəl) also path·o·log·ic (-ĭk)
(păth′ə-lŏjĭ-kəl) also path·o·log·ic (-ĭk)adj.
1. Of or relating to pathology.
2. Relating to or caused by disease.
3. Of, relating to, or manifesting behavior that is habitual, maladaptive, and compulsive: a pathological liar.
path′o·logi·cal·ly adv.