Definition

1. Noun:
   • The process of shedding or peeling off in thin layers: The natural or induced removal of dead cells or scales from a surface, especially from skin or bark.
   • A thin flake or scale that has been shed: A specific piece of material, such as dead skin or bark, that has come off through the process of exfoliation.

Examples of Usage

• Noun (Process):
  • Gentle exfoliation can improve skin texture.
  • The exfoliation of the birch tree's bark is a normal part of its growth cycle.
• Noun (Flake/Scale):
  • Microscopic exfoliations of dead skin are a constant process.
  • He brushed an exfoliation of paint from the old windowsill.

Advanced Usage

• In Geology: The process by which concentric scales, plates, or shells of rock are stripped or spall off from a rock mass due to weathering (e.g., pressure release, freeze-thaw cycles).
  • The rounded granite dome was formed by a process of exfoliation.
• In Dentistry/Medicine: The natural shedding of a primary tooth or the pathological loss of a layer of tissue.
  • The exfoliation of her baby teeth happened earlier than expected.

Variants and Related Words

• Exfoliate (verb): To remove a layer in scales or flakes; to shed dead cells from the skin's surface.
  • It is important to exfoliate your skin regularly but gently.
• Exfoliant (noun): A substance or tool used to exfoliate the skin.
  • The scrub contains natural exfoliants like ground apricot seeds.
• Exfoliative (adjective): Relating to or characterized by exfoliation.
  • The patient presented with an exfoliative dermatitis.

Synonyms

• Desquamation (noun, especially in medical/biological contexts): The shedding of the outer layers of the skin.
• Peeling (noun/gerund): The act or result of coming off in layers.
• Flaking (noun/gerund): Breaking or falling off in small, thin pieces.
• Shedding (noun/gerund): The process of casting off a natural outer covering.

Related Phrases

• Chemical exfoliation: The use of acids (like AHAs or BHAs) to dissolve dead skin cells.
  • For sensitive skin, chemical exfoliation is often preferable to physical scrubs.
• Physical exfoliation: The use of abrasive particles or tools to manually scrub away dead skin cells.
  • She prefers physical exfoliation with a soft brush.
• Exfoliation rate: The frequency or speed at which shedding occurs.
  • Sun damage can increase the skin's exfoliation rate.

Noun

1. a thin flake of dead epidermis shed from the surface of the skin
2. the peeling off in flakes or scales of bark or dead skin
   • exfoliation is increased by sunburn