elastoma 1. A tumor or focal excess of elastic tissue fibers or abnormal collagen fibers of the skin. 2. An abnormality in quality or quantity of either cutaneous collagen or elastic fibers in the dermis. 3. A chronic disease of the skin; pseudoxanthoma (a condition resembling xanthoma). Xanthoma consists of yellowish firm nodules in the skin fr... Found on http://www.wordinfo.info/words/index/info/view_unit/4284/2