Crossword clues for the word: LCM The word LCM has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for LCM Showing 1 to 4 of 4 results Clue(s) "20, in relation to 4, 5, and 10: abbr." "420, for 20 and 21: abbr." Math abbr. Mathematical concept related to multiples