Caustics

The word caustics, meaning "to burn" or "burning", may refer to:

Caustic (substance), a substance that 'eats away' or chemically burns other materials by process of attacking it basically or acidically
Caustic (optics), a bundle of light rays
Caustic, in differential geometry, the envelope of rays either reflected or refracted by a manifold. It is related to the optical concept of caustics
Sodium hydroxide, sometimes called caustic soda
Caustic (band), a rock band based in the Highlands of Scotland.

Also: critical sarcasm Template:Disambig