Crossword clues for the word: BACT The word BACT has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for BACT Showing 1 to 4 of 4 results Clue(s) "Branch of microbiology, briefly" "E. coli, for one: Abbr." Dr. Lister's field: abbr. E.coli, For one (abbr.)