- A wearing away or a state of being worn away, as by friction or pressure.
- A shallow ulcer; in the stomach and intestine, an ulcer limited to the mucosa, with no penetration of the muscularis mucosa.
- Chemically induced tooth loss, occurring mainly through acid dissolution. When the cause is unknown, it is referred to as idiopathic erosion.
[L. erosio, fr. erodo, to gnaw away]
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