thiodiglycol (??a???da???la?k?l) n (Biochemistry) C4H10O2S, a yellowish viscous liquid used as a solventCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014