Crossword clues for the word: MAXPLANCK The word MAXPLANCK has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for MAXPLANCK Showing 1 to 6 of 6 results Clue(s) "Apple computer's board in conversation with a quantum theory proponent (6)" 1918 winner who discovered energy quanta German physics Nobelist Pioneering quantum theorist Quantum theory developer. Quantum theory founder