Crossword clues for the word: DARKMATTER The word DARKMATTER has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for DARKMATTER Showing 1 to 4 of 4 results Clue(s) *Inferred cosmic substance (Russian) Astronomers can't directly detect it Debate topic that leads to grim arguments? Undetectable material in space