GALACT- Meaning of GALACT- in English [galact-] or galacto- comb form [L galact-, fr. Gk galakt-, galakto-, fr. galakt-, gala] 1: milk "galactorrhea" 2: related to galactose "galactosemia" Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012