Caustic

This disambiguation page lists articles associated with the title Caustic.
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Caustic is a word that has more than one meaning.

In general, any corrosive substance
- More specifically, a base that is corrosive to biological tissue
- The specific chemical sodium hydroxide, also known as "caustic soda"
In optics, a pattern of light from reflection or refraction by a curved surface
- In mathematics, a geometric object based on the optical pattern