caustic

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caustic
  • noun
    A caustic substance.
    A caustic surface or curve.
    adjective
    Able to burn or corrode organic tissue by chemical action. (a caustic cleaner)
    Sarcastic in a scathing and bitter way. (the players were making caustic comments about the refereeing)
    Formed by the intersection of reflected or refracted parallel rays from a curved surface.

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