korneum
Korneum is the term used in some medical and linguistic contexts to refer to the outermost layer of the epidermis, scientifically known as the stratum corneum. The word derives from Latin corneus, meaning hornlike, reflecting its protective, horn-shaped character. In many dermatology texts the two terms are used interchangeably.
Anatomy: The layer comprises corneocytes, flattened, largely enucleated keratin-filled cells, arranged in laminated sheets. They are
Function: The stratum corneum serves as the principal barrier of the skin. It minimizes transepidermal water
Variation and turnover: Thickness varies by site, typically 10–20 micrometers, with regions such as the palms
Clinical relevance: Disorders affecting the korneum, or its lipid matrix, include dry skin, eczematous dermatitis, ichthyosis,