Which of the following clinical terms best describes the thickening of the surface layer of the skin, usually in response to pressure or friction?

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The clinical term that best describes the thickening of the surface layer of the skin, usually in response to pressure or friction, is callus. Calluses usually form on the ball of the foot, the heel, and the underside of the big toe (hallux). They may, however, form over any bony prominence.

Which of the Following Clinical Terms Best Describes the Thickening