stratum spi·no·sum -spi-'nō-səm n, pl strata spi·no·sa -sə the layers of prickle cells over the layer of the stratum basale capable of undergoing mitosis called also prickle cell layer see malpighian layer
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spinous layer: in the epidermis, the layer between the stratum granulosum and stratum basale; it contains the prickle cells. See figure at epidermis. Called also prickle cell layer.Medical dictionary. 2011.