corrosion

1. a. The act or process of corroding.
   b. The condition produced by corroding.
2. A substance, such as rust, formed by corroding.

Origin:

Origin: Middle English corosioun, corrosion of tissue

Origin: , from Old French corrosion

Origin: , from Medieval Latin corrōsiō, corrōsiōn-, the act of gnawing

Origin: , from Latin corrōsus

Origin: , past participle of corrōdere, to gnaw away; see corrode