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Definition of caustic:

  1. A caustic curve or caustic surface.
  2. Alt. of Caustical
  3. Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.


stinging, truculent, black, destructive, blistery, venomous, acid, bitter, alkaline, blistering, scathing, deadly, vitriolic, slashing, trenchant, mordant, mordacious, acidulent, virulent, acidulated, sultry, vinegarish, respect, scathing, sulphurous, acerbic, corrosive, erosive, sulfurous, biting, acetous, sarcastic, irate, acerb, hot, acidic, unpleasant, red-hot, burning, attack, savage, acrid, stifling, acidulous.

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