exfoliation

/eks,fouli'eiʃn/
Học thuật
Thân thiện
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

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