hemorrhagic diathesis [-raj′ik] an inherited predisposition to any of a number of abnormalities characterized by excessive bleeding. See also Fanconi's syndrome. di·ath·e·sis (dī-ăth′ĭ-sĭs) n. pl. di·ath·e·ses (-sēz′) 1. A hereditary predisposition of the body to a disease, a group of diseases, an allergy, or. hemorrhagic diathesis [‚hem·ə′raj·ik dī′ath·ə·səs] (medicine) Any condition marked by abnormal bleeding tendency. Hemorrhagic Diathesis Hemorrhagic diathesis information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. Diathesis (medical) a hereditary or constitutional predisposition to a disease or other disorder Predisposition (psychology) The diathesis–stress model; hemorrhagic diathesis [‚hem·ə′raj·ik dī′ath·ə·səs] (medicine) Any condition marked by abnormal bleeding tendency. Hemorrhagic Diathesis Bleeding diathesis information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. Looking for online definition of bleeding diathesis in the Medical Dictionary? bleeding diathesis. hemorrhagic diathesis; hepatitis; neurofibromatosis-Noonan. Seen and Heard. What made you want to look up hemorrhagic diathesis? Please tell us where you read or heard it (including the quote, if possible). Also, bleeding diathesis can be caused by thinning of the skin or impaired wound healing. Viral hemorrhagic fevers include dengue hemorrhagic fever and Dengue.