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1The outer layer of cells covering an organism, in particular.
- ‘The outer layer is the epidermis, which contains a thin section of dead cells called the stratum corneum.’
- ‘In oil-treated fruit, cells with degenerated contents were located in all cell layers from the epidermis downwards.’
- ‘There is another layer of cells between the basal cells and the keratin-rich epidermis known as spiny cells.’
- ‘Basal cell carcinoma is a tumor arising from the basal cell layer of the epidermis.’
- ‘Basal cell carcinomas are derived from the basal layer of keratinocytes, which is the deepest cell layer of the epidermis.’
- 1.1Anatomy Zoology The surface epithelium of the skin of an animal, overlying the dermis.
epidermis, dermisView synonyms
- ‘The skin consists of an epidermis, dermis, adipose tissue layer and subcutaneous connective tissue.’
- ‘Although it is composed of two primary layers, the outer epidermis and the inner dermis, it also contains arteries, veins, nerve fibers, sweat glands and hair follicles among other things.’
- ‘At the end of gastrulation, the epidermis only covers the dorsal region and the ventral region is bare.’
- ‘The thickness of the epidermis, dermis, and subcutaneous tissue varies from person to person and from one part of the body to another.’
- ‘A second-degree burn involves the epidermis, the dermis and usually forms blisters that may be the result of superficial or deep dermal necrosis.’
- 1.2Botany The outer layer of tissue in a plant, except where it is replaced by periderm.
- ‘The plant epidermis is a multifunctional tissue playing important roles in water relations, defence and pollinator attraction.’
- ‘In the epidermis of third-year leaves, the densest silica deposition was observed in silica cells of both the adaxial and abaxial epidermises as in first-year leaves.’
- ‘Guard cells are located in the epidermis of plant leaves and, in pairs, form stomatal pores.’
- ‘Leaves are composed of various kinds of tissues, including epidermis, mesophyll, bundle sheath, and vascular bundles.’
- ‘Tomato is a fleshy fruit composed of different tissues: the epidermis, the pericarp and the placenta, and locular tissue including seeds (pulp).’
Early 17th century: via late Latin from Greek, from epi upon + derma skin.
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