Medical Definition of Erosion

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Erosion: An erosion is an eating away of a surface. ("Erodere" in Latin means to eat out.)

For example, a skin erosion is a loss of part or all of the epidermis (the outer layer) leaving a denuded surface.

For another example, tooth erosion is a gradual loss of the normally hard surface of the tooth because of chemical processes.

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Reviewed on 12/27/2018

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