rock brake   (TTS Sound)

The noun rock brake has 3 senses

• cliff brake, cliff-brake, rock brake -- (any of several small lithophytic ferns of tropical and warm temperate regions)


• rock brake -- (dwarf deciduous lithophytic ferns)


• rock polypody, rock brake, American wall fern, Polypodium virgianum -- (chiefly lithophytic or epiphytic fern of North America and east Asia)