'keratosis' originates from Greek, specifically the word 'keratos,' where 'kerat-' meant 'horn' or 'hard.'

'keratosis' was derived from the Greek word 'keratos,' and eventually became the modern English word 'keratosis.'

Initially, it meant 'horn-like condition,' but over time it evolved into its current meaning of 'a skin condition characterized by thickened patches.'