Englishfor English speakers
corrosion
Noun
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Corrosion is the breakdown of materials due to chemical reactions.
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Corrosion is the erosion by chemical action, especially oxidation.
cavity
Noun
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A cavity is a hole or hollow area.
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A cavity is a hollow area inside the body (like the sinuses).
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A cavity is a hole in a decayed tooth.
You have a cavity in your back teeth.