trichloroacetic acid Syllabification: (tri·chlo·ro·a·ce·tic ac·id)Pronunciation: /trīˌklôrōəˈsētik/ (also trichloracetic acid /-ˌklôrəˈsetik/)Definition of trichloroacetic acid noun Chemistry a toxic deliquescent crystalline solid used as a solvent, analgesic, and anesthetic. Chemical formula: CCl3COOH Derivatives trichloroacetatePronunciation: /-ˈasiˌtāt/ noun trichloroacetic acid in other Oxford dictionaries Definition of trichloroacetic acid in the British & World English dictionary