1983. Epidermis definition, the outer, nonvascular, nonsensitive layer of the skin, covering the true skin or corium. Definition: The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis. It is mostly made up of flat, scale-like cells called squamous cells. epidermis [ep″ĭ-der´mis] (pl. The epidermis is made of four main layers, or strata: The stratum corneum is the thick, tough outer layer. Definition - What does Epidermis mean? epider´mides) (Gr.) The outermost is the epidermis. Louis, MO. See more. In invertebrates, the outermost layer of cells of the organism.. epidermis outer layer of skin cells Source: Noland, George B. The epidermis is the outermost layer of our skin. General Biology, 11th Edition.St. The dermis is present beneath the epidermis layer that comprises a pilosebaceous unit, fibroblasts, collagen, mast cells and capillaries. This consists mainly of cells called keratinocytes, made from the tough protein keratin (also the material in hair and nails). Learn with flashcards, games, and more — for free. Content: Human Skin Layers. Epidermis could refer to: In plants, the outermost layer of cells covering the leaves and young parts of a plant is the epidermis. Under the squamous cells are round cells called basal cells. the outermost and nonvascular layer of the skin, derived from the embryonic ectoderm, varying in thickness from 0.07 to 1.4 mm. It is the outermost, protoderm-derived layer of cells that covers seeds, fruits, flowers, leaves, roots, and stem parts. Medical Definition of Epidermis. Although they serve a number of important functions, their primary role is to protect from a variety of harmful factors (environmental stressors) including microbes, chemical compounds as well as … Definition of Skin In vertebrates , epidermis is the outermost layer of the skin . C. V. Mosby . In vertebrates, epidermis is the outermost layer of the skin. The epidermis is mostly made up of flat, scale-like cells called squamous cells. Subcutis is the innermost layer containing loose connective tissues, fatty tissues and elastin, which acts as an intermediate link between the skin and bones. Epidermal cells include several types of cells that make up the epidermis of plants. home >> biology >> definition In plants , the outermost layer of cells covering the leaves and young parts of a plant is the epidermis . Skin is made up of three layers. Epidermis. Its main purpose is protection. Under the squamous cells are round cells called basal cells. epidermis definitions - from layers, to function, and structures. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Epidermis: The upper or outer layer of the two main layers of cells that make up the skin. 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