trichloroacetic acid

== English == === Noun === trichloroacetic acid (uncountable) (organic chemistry) The chlorinated derivative of acetic acid CCl3-COOH used as a herbicide and topical antiseptic. Alternative form: TCA (initialism) Hypernyms: acid < compound, substance, material Coordinate term: trichloroacetate (coordinate as a base versus an acid, but synonymous in the practical sense that the conjugate base and conjugate acid coexist in solution)