Definition of caustics:
(adj) :
Capable of burning, corroding or destroying organic tissue.
(adj) :
(of language, etc.) Sharp, bitter, cutting, biting, and sarcastic in a scathing way.
(n) :
Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.
(n) :
(informal, chemistry, uncountable) Caustic soda.
(n) :
(optics, computer graphics) The envelope of reflected or refracted rays of light for a given surface or object.
(n) :
(mathematics) The envelope of reflected or refracted rays for a given curve.