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rock brake
 
Noun rock brake has 3 senses
  1. cliff brake, cliff-brake, rock brake - any of several small lithophytic ferns of tropical and warm temperate regions
    --1 is a kind of fern
    --1 is a member of Pellaea, genus Pellaea
    --1 has particulars:
     coffee fern, Pellaea andromedifolia; purple rock brake, Pellaea atropurpurea; bird's-foot fern, Pellaea mucronata, Pellaea ornithopus
  2. rock brake - dwarf deciduous lithophytic ferns
    --2 is a kind of     fern
    --2 is a member of Cryptogramma, genus Cryptogramma
    --2 has particulars:
     American rock brake, American parsley fern, Cryptogramma acrostichoides; European parsley fern, mountain parsley fern, Cryptogramma crispa
  3. rock polypody, rock brake, American wall fern, Polypodium virgianum - chiefly lithophytic or epiphytic fern of North America and east Asia
    --3 is a kind of polypody
rock rock and roll rock band rock barnacle rock bass rock beauty rock bit rock bottom rock brake rock cake rock candy rock climber rock climbing rock concert rock cornish rock cornish hen rock crab

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