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British Dictionary definitions for rock brake

rock brake

noun
  1. any of various ferns of the genera Pellaea and Cryptogramma, which grow on rocky ground and have sori at the ends of the veins
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for rock brake

Historical Examples

  • On the same cliff were tufts of the alpine woodsia and dense patches of rock-brake—but these stand in no need of the bee.

    In the Open

    Stanton Davis Kirkham