stratum corneum, the horny, outermost layer of the skin, composed of dead flat cells converted to keratin that continually flakes away. The thickness of the layer is correlated with the normal wear of the area it covers. The stratum corneum is thick on the palms of the hands and the soles of the feet but relatively thin over most areas. Also called horny layer. Compare stratum basale, stratum granulosum, stratum lucidum, stratum spinosum. See also skin.
