1. to convert into or become keratin; to undergo or cause to undergo the process of keratinization
Usage: third-person singular present tense; biology/medical term

Examples

• The outer layer of skin keratinizes as cells mature and move upward.
• During wound healing, the epidermis keratinizes to form a protective barrier.
• Hair keratinizes as it grows from the follicle.
• The protein gradually keratinizes, becoming harder and more resistant to damage.
• Nails keratinize through a process of cell differentiation and protein accumulation.