Original photographs by Ansel Adams are defined as photographs printed by Ansel Adams from the negatives he made (photographed and developed). Most will range between $4,000 and $70,000.
Keratosis is the term for any condition that is a benign overgrowth  and thickening of the epidermis.
Called also clear layer. Present in the epidermis of the planum nasale of several species and footpads of carnivores. stratum spinosum. the layer of the epidermis between the stratum granulosum and the stratum basale, marked by the presence of prickle cells; called also spinous layer and prickle-cell layer.stratum tectorium. the layer of horny scales claimed to exist on the surface of the horse's hoof that gives it the smooth glossy appearance.. the lower layer of the nail, from which the nail grows; called also germinative layer. stratum granuloÂ´sum the cell layer of the epidermis lying between the stratum lucidum and the stratum spinosum. Called also granular layer. 1. the deep layer of the cortex of the cerebellum.