Definition

Noun: The biological process by which the protein keratin accumulates within cells, causing them to become hardened and horn-like. This process is a key part of the formation and growth of structures such as hair, nails, feathers, horns, and the outer layer of skin.

Examples of Usage

• The keratinisation of skin cells creates a protective barrier against the environment.
• A nail is the visible result of the keratinisation process in the nail bed.
• Understanding keratinisation is important for treating certain skin disorders.

Advanced Usage

• "Degree/level of keratinisation": Refers to how much keratin is deposited, which varies in different tissues.
  • The cornea has a very low degree of keratinisation to remain transparent.
• Used in medical and biological contexts to describe both normal physiological processes and pathological conditions.

Variants and Related Words

• Keratinization (noun): The American English spelling of .
• Keratinise (verb, chiefly British): To undergo or cause to undergo keratinisation.
  • The cells keratinise as they move to the skin's surface.
• Keratinized (adjective): Describing a tissue that has undergone this process.
  • The keratinized epithelium of the skin.

Synonyms

• Cornification
• Hornification

Notes on Meaning

This term is highly specific to cell biology, dermatology, and histology. It describes a precise, microscopic process of cellular differentiation and hardening, not a general action.

Noun

1. organic process by which keratin is deposited in cells and the cells become horny (as in nails and hair)