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Adjective: caustic  kos-tik
  1. Harsh or corrosive in tone
    "caustic jokes about political assassination, talk-show hosts and medical ethics";
    - acerb, acerbic, acid, acrid, bitter, blistering, sulfurous [N. Amer], sulphurous [Brit, Cdn], virulent, vitriolic, acidulous, sulphureous [Brit]
     
  2. Of a substance, especially a strong acid; capable of destroying or eating away by chemical action
    - corrosive, erosive, vitriolic, mordant
Noun: caustic  kos-tik
  1. Any chemical substance that burns or destroys living tissue
     
  2. (physics) the intersection of reflected or refracted (or more generally lensed) light rays

Derived forms: caustics

See also: destructive, unpleasant

Type of: chemical compound, compound

Encyclopedia: Caustic