Crossword clues for the word: ETHYLENE The word ETHYLENE has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for ETHYLENE Showing 1 to 4 of 4 results Clue(s) ___ glycol (antifreeze) "Colorless, flammable gas used as an anesthetic" C2H4 Citrus colorant