Crossword clues for the word: SILURIAN The word SILURIAN has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for SILURIAN Showing 1 to 3 of 3 results Clue(s) Geologic period between the Ordovician and Devonian periods of the Palaeozoic era Of a geological period. Period in which early invertebrate land animals appeared