thio·gly·colate noun alsothio·gly·col·late\ˌthīōˈglīkəˌlāt, -ˌglī- ˈkälə̇t\ Etymology: International Scientific Vocabulary thioglycol-, thioglycoll- (from thioglycolic acid thioglycollic acid) + -ate : a salt or ester of thioglycolic acid : a mercapto-acetate