has part has part has_part characteristic of has modifier abnormal epidermal layer morphology epidermal atrophy acquired diminution of the size of epidermal layer of the skin, associated with wasting as from death and reabsorption of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes MPheno.ontology MP:0001221 skin atrophy abnormal atrophied skin epidermis