erosion

ero·sion

noun \i-ˈrō-zhən\

Definition of EROSION

1

a : the superficial destruction of a surface area of tissue (as mucous membrane) by inflammation, ulceration, or trauma <erosion of the uterine cervix> b : progressive loss of the hard substance of a tooth

2

: an instance or product of erosion <a circular erosion on the skin>