American rock brake

noun

Definition of American rock brake

  1. :  a rock-inhabiting fern (Cryptogramma acrostichoides) of northern North America

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

1880

First Known Use of american rock brake

1880


Seen and Heard

What made you want to look up American rock brake? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a rounded knoll or a ridge of ice

Get Word of the Day daily email!