Definition of Erosion

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.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=9562
Last Editorial Review: 6/14/2012