(|)trī+- noun
also tri·chloracetic acid “+-
Etymology: International Scientific Vocabulary trichlor- + acetic
: a strong vesicant pungent deliquescent crystalline acid CCl 3 COOH made usually by chlorinating acetic acid or by oxidizing chloral and used in medicine as a caustic and astringent and especially in the form of salts in weed control — abbr. TCA