1. An epithelial neoplasm or hamartoma of the skin, especially of skin appendage origin.
2. Obsolete term for a carcinoma of the skin derived from squamous, basal, or adnexal cells.
The information shown above for epithelioma is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.