Crossword clues for the word: MDCX The word MDCX has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for MDCX Showing 1 to 2 of 2 results Clue(s) "Date inscribed in Galileo's ""Sidereus Nuncius""" 17th-century year when Henry Hudson entered his bay