from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An anode attached to a metal object, such as a boat or underground tank, to inhibit the object's corrosion. The anode is electrolytically decomposed while the object remains free of damage.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A piece of corrodible metal, attached to a metallic surface to be protected, that is preferentially consumed by electrolytic action
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