Crossword clues for the word: PENICILLIN The word PENICILLIN has appeared as an answer to at least 12 crossword clues on different crossword puzzles. Crossword clues for PENICILLIN Showing 1 to 12 of 12 results Clue(s) *Antibiotic from blue mold Antibiotic Antibiotic drug Common antibiotic Common antibiotic [1928] Drug introduced commercially in 1945 Medical discovery of 1928 Saviour of millions, one described by writer, getting nothing in return Sir Alexander Fleming discovery of 1928 Sir Alexander Fleming's antibiotic Sir Alexander Fleming's discovery Sir Alexander Fleming's discovery: 1928