FRACTIONATE Meaning of FRACTIONATE in English [frac.tion.ate] vt -at.ed ; -at.ing (1867) 1: to separate (as a mixture) into different portions 2: to divide or break up -- frac.tion.ation n -- frac.tion.ator n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012