epidermis
ep-ih-DER-miss
/ˌɛpɪˈdɜːrmɪs/
The outer, protective non-vascular layer of skin covering the body of an organism.
The exterior barrier of skin that sheds dead cells and shields inner layers from pathogens and dehydration.
The story behind the word. Combines Greek 'epi-' (upon, over) and 'derma' (skin). Thus, the epidermis is literally the skin layer sitting right upon the deeper dermis.
Word relationships
- cuticle: Refers to localized outer skin layers, such as around fingernails or plant surfaces.
- dermis: The inner, thicker, vascular layer of skin beneath the epidermis.
Commonly confused with
- epidemic: An epidemic is a widespread outbreak of disease, while epidermis is skin tissue.
Word family
- epidermal (adjective): Relating to the outer skin layer.
Collocations
- outer epidermis
- epidermis layer
- epidermis cells
- epidermal barrier
Example sentences
- "The epidermis constantly sheds dead surface cells while creating new ones underneath." Dermatology
- "Ultraviolet radiation penetrates the outer epidermis, causing cellular damage and premature aging." Sun Protection
Memory hook
EPI = Outer/Above; DERMIS = Skin layer. Epidermis = Outer skin shell.
When not to use
Do not use for deep tissue layers beneath the skin surface.
Fun facts
- Humans shed roughly 30,000 to 40,000 dead epidermal skin cells every single minute!
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