1. an abnormal growth or thickening of the outer layer of skin, often appearing as a rough, scaly, or wart-like bump
Usage: medical term; commonly used in dermatology
2. a benign skin lesion characterized by an overgrowth of keratin, typically appearing in older adults
Usage: often refers to seborrheic keratosis or actinic keratosis specifically

Examples

• The dermatologist examined the keratosis on the patient's shoulder.
• Actinic keratosis can develop from prolonged sun exposure.
• Many older adults develop seborrheic keratosis as a normal part of aging.
• The doctor recommended removing the keratosis because of its appearance.
• Keratosis lesions are usually harmless but should be monitored by a physician.
• She had several keratoses removed during her annual skin check.