n. One of a large group of vascular cryptogamous plants, constituting the natural order Filices.Ancient; old; former; past; previous.Distant; remote; far off.Long ago; long before.n. In Australia, Ophioderma pendula.n. The royal fern, Osmunda regalis, which grows in low, wet situations and is thus associated popularly with snakes. See Osmunda.n. In Australia, Grammitis australis, a small species with simple leaves.n. Same as floating-fern. See Ceratopteris.