EPIDERMIS By N., Pam M.S. - April 7, 2013 1. Outer, protective non vascular layer of the skin of vertebrates.2. Outer layers of cells of some invertebrates. 3. Outermost layer of cells covering plants and leaves. EPIDERMIS: "The epidermis is the outr layer of cells covering an organism." Related Psychology Terms MENINGES EXTRADURAL HEMORRHAGE RETINA GERM LAYER EPITHELIUM CORTICAL LAYERS NEURAL NETWORKS DERMIS RETICULAR MEMBRANE RH FACTOR (RHESUS FACTOR) Cite this page: N., Pam M.S., "EPIDERMIS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/epidermis/ (accessed July 16, 2019).