a person who supports or defends a cause, especially a social cause.
capable of burning, corroding, or destroying living tissue. severely critical or sarcastic: a caustic remark. a caustic substance. Optics. caustic curve. caustic surface. Contemporary Examples Historical Examples adjective capable of burning or corroding by chemical action: caustic soda sarcastic; cutting: a caustic reply of, relating to, or denoting light that is reflected or refracted by […]
- Caustic baryta
baryta (def 2). Historical Examples
a curve formed by a plane section of a caustic surface.