Definition of "causticity" [causticity]

• The quality of being caustic (noun)

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• "His tone dripped causticity like acid from a ruptured battery."
• "“A field!” said King Louis, looking up, and assuming his wonted causticity of tone and manner."
• "He regretted, with some causticity of humor, that her father should show such inequalities of temperament as to keep Grace tightly on his arm today, when he had quite lately seemed anxious to recognize their betrothal as a fact."